Adjustable, preset and displayed temperature controls

When adjustability is essential

In brief: The adjustable-only finder returns 68 documented matches. See the same-condition adjustable result; verify the exact model's setting limits and installation instructions.

The five QPH models have a top-mounted analog adjustable dial with a 68–93°F setting range, an indicator for heating and automatic shutoff at target. The documentation supplies no numerical thermostat-accuracy tolerance or actual-water display. They remain references because the size-specific positive tank-band starts cannot be enforced by this matcher and the current offer is not established for every SKU; compare the QPH table or the QPH-100 assessment.

The TTH-1000 and TTH-1500 exact pages also confirm adjustable digital controllers, but their sources do not publish numeric setpoint endpoints. Their page capacity bands begin at 200 and 300 gallons while the linked manual maximums conflict; the upper-only matcher cannot represent the lower band, so these models remain references rather than active adjustable candidates. AquaTop also documents adjustable control for the first-generation TH-800W/DDC-800 bundle, but its exact manual is unavailable and no minimum volume is stated for the 800 W model; it remains a reference, not a finder match. See the exact TTH-1000, TTH-1500 and TH-800W/DDC-800 records; the same-condition adjustable result excludes all three references.

Finnex's THH tubes require a separate temperature controller, but the inspected manufacturer source does not identify a controller model or documented selectable range. That hardware requirement alone is not evidence for the finder's adjustable category; THH-300S, THH-500S and THH-800S remain reference-only and do not add to the 68 adjustable matches. Read the separate 300 W, 500 W and 800 W assessments.

Current reviewed scope has 68 adjustable configurations. The analog Types 3614–3619 are individually reviewed at 100 W, 125 W, 150 W, 200 W, 250 W and 300 W; they share a 65–93°F analog scale but differ in Type, upper tank capacity and body length. The distinct WLAN family adds four adjustable models: thermocontrol+ e 150 / Type 3666, 200 / Type 3667, 250 / Type 3668 and 300 / Type 3669. All four have a manual-stated 68–90°F range, glass bodies and Type-specific maximums; WLAN does not make them shatterproof. The seven distinct OASE HeatUp US SKUs also use an adjustable 66–90°F range; their 205–440 mm lengths and separate conservative capacity limits differ, and their US technical voltage table conflicts with page narrative copy. Compare 25 W, 100 W, 400 W and the full OASE comparison. Open the same one-answer finder result for all 68 adjustable configurations.

The seven conventional AquaTop GH glass models are adjustable with a conservative 68–93°F overlap from the current pages and the older family manual; that older manual gives a 65°F lower endpoint and 8-inch height for the conventional 50/75 W rows, unlike current-page heights. The separate GH PRO quartz-glass products use their own exact model table and body dimensions: 50 W / 8.9 in / 15 gal, 100 W / 9.5 in / 30 gal, 200 W / 11.1 in / 55 gal and 300 W / 13.5 in / 80 gal. Their exact pages state a 68–93°F adjustable range; do not transfer the conventional GH manual's 65°F value or dimensions to GH PRO. Neither line has an independently verified setting-accuracy figure or numerical water-temperature display.

The five exact AquaTop HTG guarded-glass models also use an adjustable 68–93°F dial. Their wattage-specific listed heights are 9.5, 11.5, 13.5, 15.75 and 18 inches for HTG-50/100/200/300/400; no model publishes a numeric accuracy tolerance or live water-temperature display. For the last three wattages, exact-page and older official maximums differ, so the finder uses the lower 40/60/100-gallon historical figures. The guard is not a shatterproof-body claim. Compare the individual HTG-50, HTG-200 and HTG-400 reviews or the family guide.

Fluval's reviewed M, E and T units and all nine reviewed EHEIM electronic e models also have adjustable thermostats, but their ranges differ: M is 66–86°F; E is 68–93°F; T is 72–90°F; EHEIM e and thermocontrol+ e each use a distinct 68–90°F electronic control interval. All nine classic Jäger variants use an analog 65–93°F range. The P models are preset rather than adjustable, even though their fixed 76–78°F range overlaps some chosen targets.

The Aqueon Preset PS50H/PS100H/PS150H/PS200H variants are also fixed at 78°F with stated +/-1°F accuracy and no user adjustment, so they do not join the adjustable set. Their exact manual capacity bands begin at 5/20/30/55 gallons; the current matcher cannot apply those lower bounds and keeps all four as reference-only reviews.

Decision: If you need an adjustable heater setting, the current library returns 68 active models, including sixteen distinct AquaTop GH, GH PRO and HTG sizes and three current EX digital configurations with a 68–93°F range, plus seven OASE HeatUp US sizes with a 66–90°F range; confirm the exact model's control range and capacity boundary. See every adjustable match. The external LCD and touch control belong to the three distinct EX-100, EX-200 and EX-300 wattages, with 25/50/75-gallon conservative ceilings; the manual says the display shows actual water temperature but gives no numerical accuracy tolerance. Compare the EX capacity and control differences with guarded HTG-50, HTG-200 and HTG-400 via the five-size HTG guide with conventional GH-50W, GH-150W and GH-300W plus distinct GH PRO 50 W and 300 W quartz-glass models by capacity, size and exact instructions. Also compare HeatUp 25, 150, 400 W or the OASE family guide with Fluval M100 dial control, Fluval E50 digital display, Fluval T100 status ring, classic analog Jäger 100 W, electronic e e150, and WLAN-controlled thermocontrol+ e 150 and 200 W; those workflows and model limits are not interchangeable.

The new HMH and HMS manual rows document adjustable digital control from 50–94°F in 0.1°F increments with a stated ±0.5°F display accuracy. That is not an independently measured tank-water tolerance. Their low-water alarm/cutoff operates only from 58–92°F; outside that interval the manual says the system is disabled and heating may continue if the sensor is exposed. The HMH sensor is internal and the HMS sensor is a separate probe, but all twelve remain reference-only due to unresolved full supply/retail identity, so the 68 active adjustable candidates do not change.

Reference note: HMH/HMS manuals document adjustable 50–94°F settings, but their low-water cutoff is limited to 58–92°F. Those twelve reference models do not increase the 68 active adjustable matches.

The exact AquaTop TQ-100W, TQ-200W and TQ-250W are fixed 78°F preset models, not user-adjustable heaters. Their exact 15–30, 55–75 and 75–85-gallon package bands also prevent them from joining live results under the current max-only volume rule; read all three separate reviews in the TQ comparison.

The AquaTop PCS-10W and PCS-25W are likewise fixed at 78°F, not adjustable. Their exact pages show a built-in preset thermostat rather than a dial or selectable setpoint; read the Pisces comparison for their 3-gallon and disputed 5/8-gallon maximum screens.

Finnex STE control steps and endpoints

Finnex's official Shop description says the STE controller changes its setting by one degree and advertises ±1°F accuracy; its comparison chart lists a 68–92°F range. The four Shop variants—STE-200, STE-400, STE-600 and STE-800—share that series-level control range. This is a manufacturer claim, not an independently measured tolerance or a guarantee that the aquarium water will match a displayed number.

At the listed 68°F lower setting, the STE controller is at its documented lower endpoint; at 92°F it is at the upper endpoint. See the complete setpoint-only results at 68°F or at 92°F. The current finder does not include STE models because their capacity bands have unmatchable lower limits and the complete installation route remains unverified. Use a separate aquarium thermometer to check the actual water, and choose a target that suits the animals rather than treating the heater's control limit as a husbandry recommendation.

When a fixed preset is acceptable

In brief: Five models meet the preset-only finder choice: AquaTop Pisces PCS-10W/PCS-25W at 78°F and Fluval P10/P25/P50 at 76–78°F. See the same-condition preset result; the Aqueon preset references stay out because their minimum tank sizes cannot be applied.

The six AquaTop TH-C sizes are not preset-only alternatives: each exact page documents an adjustable 68–92°F range. They are excluded when “fixed preset temperature only” is required. See the same-condition preset result and compare the TH-C models if adjustment is needed.

QPH is also adjustable, not preset-only: all five models use an analog setting dial covering 68–93°F. That does not meet a fixed-temperature-only requirement, and their positive band minima independently keep them out of active finder results. Compare the QPH models before deciding whether adjustment is useful.

The TTH-1000, TTH-1500 and first-generation TH-800W/DDC-800 also document adjustable controllers, not fixed presets. They are references for other source and matching limitations, and none joins the five active preset models. The separate TTH-1000, TTH-1500 and first-generation 800 W bundle reviews retain their exact controller details; the same-condition finder shows only fixed-preset matches.

No fixed temperature or preset point was established for the three Finnex THH tubes. Their required external controller is not documented here as a fixed thermostat, so these tube references do not join the three Fluval P preset matches or the separate Aqueon preset records. See the distinct THH-300S, THH-500S and THH-800S source assessments.

The Pisces PCS-10W and PCS-25W join Fluval P10, P25 and P50 as five current preset matches. The two Pisces exact pages show a fixed 78°F setting; their 10 W and 25 W units remain distinct by capacity and both miss when a requested setpoint differs from 78°F. All seven conventional GH sizes, four distinct AquaTop GH PRO sizes and five guarded HTG models use adjustable controls rather than a fixed preset, so none appears when preset is required; GH PRO has its own quartz-glass table and does not inherit conventional GH dimensions or capacities, while HTG has distinct guard/capacity claims. Fluval describes its fixed 76–78°F operation; none offers the user an adjustable target. Aqueon's PS50H/PS100H/PS150H/PS200H also use a fixed 78°F preset, but they are reference-only because their exact manual lower aquarium-size limits (5/20/30/55 gallons) cannot be enforced by this matcher. A desired setting above 78°F or below 76°F rules out the P set, and none of these fixed presets settles livestock needs. See the HTG comparison to distinguish its adjustable dial from the Fluval fixed presets.

HMH and HMS are adjustable-controller families, not fixed presets: both manuals identify selectable settings from 50–94°F. Their distinct internal-versus-remote sensor arrangements do not turn the selected value into a preset, and their size/retail records remain reference-only. They do not change the three Fluval P candidates and two Pisces candidates or the separate Aqueon Preset references.

Reference note: HMH/HMS manual rows use adjustable 50–94°F digital controls rather than a fixed preset, so none joins the five active Pisces/Fluval matches or four Aqueon preset references.

AquaTop lists a fixed 78°F preset for the distinct TQ-100W, TQ-200W and TQ-250W models. Their exact carton bands are 15–30, 55–75 and 75–85 gallons; these lower edges are package recommendations rather than a published minimum-safe-volume statement, but the current matcher cannot condition on them. The models therefore remain reference-only, rather than joining the five active preset matches. Compare their exact pages and qualifications in the TQ guide.

Decision: If a fixed temperature is acceptable, the matcher returns five current models: AquaTop Pisces PCS-10W and PCS-25W fixed at 78°F, plus Fluval P10/P25/P50 with a 76–78°F fixed range; four Aqueon Preset references remain outside results because their minimum tank sizes cannot be enforced. Check the same preset-only answer in the finder. Read the exact PCS-10W and PCS-25W reviews beside the three Fluval P10, P25 and P50 assessments; a fixed 78°F value is not species-specific temperature advice.

Check a requested numeric setting against the actual range

TH-C setting limits: TH-C100, TH-C200, TH-C300, TH-C400, TH-C500 and TH-C800 each have an exact-page adjustable span of 68–92°F. Both 68°F and 92°F are included; 67°F and 93°F are outside it. Compare 67°F, 68°F, 92°F and 93°F with all other choices held open, and see the six-model comparison.

QPH endpoint check: AquaTop's cutsheet gives each QPH dial an inclusive 68–93°F setting interval. The five models remain reference-only, so even an in-range request does not make them active candidates; 67°F is below their documented range and 94°F is above it. Check 67°F, 68°F, 93°F and 94°F with all other choices held open; compare the QPH source limits.

Combined boundary decision: With saltwater, 265 gallons, in-tank installation and adjustable control, only TH-C800 remains an active match at the documented 68°F lower endpoint or 92°F upper endpoint. The TTH-1000/1500 setting limits are unknown, and the first-generation 800 W bundle remains reference-only because its exact manual and minimum volume are unresolved. Check the same five choices at 68°F; check 92°F. With saltwater, 265 gallons, in-tank placement, adjustable control and a required 67°F setting, the reviewed active matcher returns no model: TH-C800 starts at 68°F, and the TTH and first-generation references do not provide a supported alternative. Check the same five choices at 67°F. With those same four other answers and a required 93°F setting, the reviewed active matcher also returns no model: TH-C800 ends at 92°F, and the TTH and first-generation references do not provide a supported alternative. Check the same five choices at 93°F. Both empty results describe this reviewed library, not every heater on the market. Compare TH-C800 with the distinct TTH-1000, TTH-1500 and first-generation TH-800W/DDC-800 reviews.

First-generation control boundary: AquaTop lists the DDC-800 controller's own span as 65–98°F but separately gives the heater/product a 68–92°F range; because the page does not explain that difference, the reviewed fact uses only the overlap for setpoint evidence. The 68°F and 92°F endpoints are inside that range, while 67°F and 93°F are outside it. The system nevertheless remains reference-only because its exact manual is unavailable and its minimum aquarium volume is unstated; its separate 270-gallon maximum is beyond the 265-gallon form limit. These source facts do not add it to the saltwater, 265-gallon, in-tank, adjustable results above.

The THH family page says a separate controller is required but the inspected sources do not name the controller or publish its setting range. Do not infer that a THH tube supports a particular requested number—such as 90°F—from the heater wattage or the controller requirement. The three THH-300S, THH-500S and THH-800S references have no numeric setpoint evidence; this guide's setting boundaries apply only to models with an identified documented range or preset.

The conventional AquaTop GH current pages and data sheet give a 68–93°F scale while the older family manual gives a 65°F lower endpoint. Using the evidence overlap, those conventional GH models are screened at 68 and 93°F but not 67 or 94°F; these values describe the selectable setting, not actual water temperature. At 67°F the GH sizes fall outside the conservative range, at 68°F they enter it, at 93°F they remain, and at 94°F they leave. The exact GH-50W and GH-300W reviews preserve the source conflict and manual safety instructions.

The distinct GH PRO Quartz exact-model pages state a 68–93°F adjustable interval for GHPRO-050W, -100W, -200W and -300W. All four GH PRO models are excluded at 67°F and included at 68°F; all four remain within range at 93°F and are excluded at 94°F. Compare the four separate 50 W, 100 W, 200 W and 300 W reviews; their settings are not measured water temperature, and no numeric accuracy tolerance is published in the reviewed sources.

Decision: Each HeatUp US model has a stated 66–90°F range: no OASE size supports a 65°F setting, the seven are within range at 66°F and again at the inclusive 90°F endpoint, and none supports 91°F. Compare the 65°F setting with 66°F, and check 90°F against 91°F. The ±2°F versus ±3°C secondary calibration wording is not an accuracy tolerance or a measured tank reading; use a separate thermometer and a livestock-appropriate target.

Interaction: Hold freshwater, a 6-gallon volume, in-tank installation and adjustable control constant. At 65°F, no OASE HeatUp passes its documented setting range; at 66°F, all seven pass the setpoint screen. Both conventional GH and GH PRO are excluded at those lower settings by the conservative 68°F boundary. At 90°F, each AquaTop line remains within range, while no OASE is in range at 91°F. All seven conventional GH models and four distinct GH PRO sizes also remain within the shared conservative 68–93°F screen at both settings; compare GH-50W, GH PRO 50 W and 300 W. Compare the specific HeatUp 25 and HeatUp 400 boundaries; these are controls-only screens layered onto the same tank context, not measurements or a species-specific target.

For direct models whose adjustability and range differ, compare Fluval E50, E100, E200 and E300 digital models with the preset P25 and analog Jäger models below; a chosen setting is not a measured temperature.

For a specific electronic-range comparison, see EHEIM e25, e50, e75, e100, e125, e150, e200, e250 and e300, or the separately sourced WLAN + e 150, 200, 250 and 300; both electronic product families have distinct identities despite sharing a manual-stated 68–90°F interval, unlike Jäger's 65–93°F analog range.

With only the numeric setting entered, the finder returns 73 current models at 78°F, including adjustable heaters and five fixed-preset models; the four Aqueon Preset models remain reference-only because the matcher cannot enforce their model-specific minimum tank sizes. At 79°F all five active preset matches leave and 68 adjustable models remain. At 90°F, 63 documented ranges or presets still cover the setting, including seven conventional GH sizes, four GH PRO models, five HTG models, three EX digital models, six TH-C models, all seven OASE HeatUps, nine EHEIM e variants, four thermocontrol+ e WLAN sizes, all nine classic Jäger models, five Fluval T sizes and four Fluval E models. At 91°F, OASE, both electronic EHEIM families and Fluval T are above their documented 90°F endpoints; 38 matches remain across the 25 AquaTop GH/GH PRO/HTG/EX/TH-C models, nine Jäger models and four Fluval E models. The conventional GH, GH PRO, guarded HTG and EX lines remain through their 93°F endpoint and fall outside it at 94°F; TH-C ends at 92°F. The HeatUp and thermocontrol+ e upper limits are 90°F; the EHEIM product-page lower endpoint conflicts with the English manual's 68°F entry, so check the supplied instruction sheet. Same-condition links below illustrate the exact 67/68 and 90/91 boundaries.

The four Aqueon Preset references have an exact 78°F fixed setting and stated +/-1°F accuracy; their plan uses the specified setting point rather than interpreting the accuracy as an adjustable 77–79°F range. At 78°F they still do not enter the matching set, because their manual volume minima are not expressible by the current matcher. The one-answer 78°F setting screen lists supported matcher candidates, not these Aqueon references; 79°F is outside their fixed point as well.

Decision: At 78°F, the setting-only finder returns 73 current candidates with a documented control range or preset point. The five active presets are the two Pisces models at 78°F and Fluval P10/P25/P50 at 76–78°F. The four Aqueon PS-series manuals also specify a fixed 78°F point, but those models stay out of results because the matcher cannot enforce their distinct 5/20/30/55-gallon lower limits; their stated +/-1°F accuracy is not another selectable range. Compare the exact setting-only result and read the separate 50 W, 100 W, 150 W and 200 W reference assessments.

A number in the questionnaire means “is this setting within the heater's documented control range?” It does not certify measured water temperature, heater accuracy or a safe biological target. No reviewed heater in the current library has a documented setting range that reaches 64°F: classic Jäger starts at 65°F, while the reviewed adjustable Fluval, OASE and EHEIM electronic families start higher; this is a reviewed-record boundary, not an unsupported-market-wide claim. At 65°F, all nine classic Jäger variants are the only matches; the 64°F setting has no reviewed match. Compare the exact Jäger 50 W and 75 W reviews with the 25 W variant before using an analog dial; its marking is not a measured water reading. The conventional GH sources conflict at 65/68°F, so this edition screens that line from the current-page/manual overlap; GH PRO exact pages independently state 68–93°F and are also outside a 65°F or 66°F request. At 78°F, 73 current matcher products have a documented range or preset; the four Aqueon Flat models do not count because the 5/7.5 W sources lack a user control range and the 15 W item is reference-only. At 79°F, all five active preset models drop out and the 68 adjustable matches remain.

Decision: A 78°F setting is within the documented range or preset of 73 active matcher candidates. Neither Aqueon Flat 5 W nor 7.5 W publishes a user control range, and the Flat 15 W is reference-only; at 79°F all five active preset matches are gone and 68 adjustable models remain. Read the separate EX comparison for its three additional wattage and capacity boundaries. See models supporting 78°F or see models supporting 79°F; 64°F has no reviewed match, while 65°F is supported by all nine Jäger variants. Compare preset P25, adjustable M100, conventional GH-50W, separate quartz-glass GH PRO 50 W, OASE's separate 66–90°F range, analog Jäger 100 W, electronic thermocontrol e 200 and WLAN thermocontrol+ e 150.

At 90°F, 63 reviewed models remain, including seven conventional AquaTop GH sizes, four GH PRO models, five HTG models, three EX digital models, six TH-C models, all seven OASE HeatUps, nine EHEIM e variants, four thermocontrol+ e WLAN sizes, all nine classic Jäger models, five Fluval T sizes and four Fluval E sizes. At 91°F the OASE, electronic EHEIM and T ranges end; 38 models remain across the 25 AquaTop GH/GH PRO/HTG/EX/TH-C configurations, nine Jäger models and four Fluval E models. See all 90°F candidates or see the 38-model 91°F result. At the inclusive 93°F endpoint, the nineteen AquaTop GH, GH PRO, HTG and EX sizes, nine Jäger and four Fluval E models remain; check that upper boundary. A heater-setting limit is not a livestock recommendation or a reading of tank temperature.

Decision: With a freshwater, in-tank adjustable setup and a 30-gallon volume held constant, 67°F is below every thermocontrol+ e model's manual-stated 68°F lower limit; at 68°F the four WLAN sizes enter the matching set. Check 67°F and 68°F, then compare Type 3666, 3667, 3668 and 3669. The 68°F floor comes from the English manual's Fahrenheit table; EHEIM's product pages show an 18°C lower figure, so verify the supplied manual rather than assuming a unit conversion resolves the discrepancy.

Decision: The four thermocontrol+ e types also share an inclusive 90°F manual ceiling: in the same freshwater/in-tank/adjustable 30-gallon conditions, each matches at 90°F and is removed at 91°F. Compare their four Type-specific capacity and length limits; this is a setting-range boundary, not advice to keep aquarium animals at 90°F.

Decision: As a setting-only comparison, 67°F is below the thermocontrol+ e manual's 68°F minimum; at 68°F, all four WLAN models enter the matching set. See the 67°F result and the 68°F threshold. A lower manual-backed setting example is analog Jäger Type 3611 / 25 W; at 68°F compare each distinct WLAN size: Type 3666, 3667, 3668 and 3669.

Decision: The thermocontrol+ e Types 3666–3669 include 90°F at the top of the manual interval and are removed at 91°F. See the 90°F boundary and the same setting question at 91°F. Compare all four exact model reviews—150 W, 200 W, 250 W and 300 W—and read the manual/page lower-endpoint discrepancy before relying on a 68°F setting.

The HTG-50/100/200/300/400 exact manufacturer pages each give the adjustable dial's 68–93°F interval. For each HTG size, a 67°F request falls below that selectable range, 68°F is the inclusive low edge, 93°F is the inclusive high edge, and 94°F is outside it. With freshwater, a six-gallon volume, in-tank installation and adjustable control held constant, all five HTG sizes are excluded at 65°F and 66°F by the 68°F lower edge, while all five stay within range at 90°F and 91°F. The same-condition finder links for those four choices are in the comparison immediately above. HTG settings at 68°F and 93°F are included at the documented interval endpoints; requests at 67°F and 94°F are outside the stated setting range. The guard around a glass heater does not mean the heater body is documented as shatterproof. This is a setting-range filter, not proof of accuracy or a measured tank-water temperature; compare each exact model in the HTG guide and the individual HTG reviews.

AquaTop's exact TQ-100W, TQ-200W and TQ-250W pages list a preset at 78°F, not an adjustable range: each includes the 78°F setpoint and a different number is unsupported. No numeric accuracy tolerance is published, so the fixed point is not a promise of measured aquarium temperature. These models remain reference-only because their 15–30, 55–75 and 75–85-gallon package bands have distinct lower edges the current matcher cannot enforce; those package values are not restated as minimum-safe tank volumes. See the separate TQ-100W, TQ-200W and TQ-250W reviews and the TQ guide.

For the six exact TH-C settings, read TH-C100, TH-C200, TH-C300, TH-C400, TH-C500 and TH-C800. Their exact pages state the same adjustable 68–92°F endpoints; a requested setting in that span is not a guarantee of actual water temperature.

At the top of the published control ranges

Current catalog scope includes all nine classic Jäger analog sizes: 100 W, 125 W, 150 W, 200 W, 250 W and 300 W join the previously reviewed 25/50/75 W models at the inclusive 93°F scale end; none matches a 94°F request. Same-answer finder for 93°F / 94°F.

Fluval's E Series and the classic Jäger line reach 93°F. EHEIM's electronic e line and Fluval T top out at 90°F, the Fluval M range at 86°F and P's fixed range at 78°F. A 94°F request exceeds every reviewed range.

Decision: At 93°F alone, a setting-only finder request returns 32 current candidates: seven conventional GH sizes, four GH PRO models, five guarded HTG models, three digital EX configurations, all nine classic Jäger sizes and four Fluval E models. At 94°F, a setting-only request returns no candidate because every reviewed control or preset range is exceeded. See 93°F candidates or check 94°F. Compare the distinct quartz-glass GH PRO 50 W and 300 W models with Jäger 25 W, 50 W, 75 W, 100 W, 125 W, 150 W, 200 W, 250 W and 300 W with E50, E100, E200 and E300 by their separate rated tank volumes; use a separate thermometer to verify actual water temperature.

No reviewed model has a documented control or preset range that reaches 94°F; do not treat a no-match result as evidence about products not yet researched for this site.

HMH/HMS control range is wider than its low-water protection range

The two Finnex manuals list an adjustable setting from 50–94°F in 0.1°F increments, but describe the low-water alarm/cutoff as active only from 58–92°F. The cutoff therefore is not available at a 93°F or 94°F selection; the manual warns that if the sensor is out of water outside the active interval, heating may continue. HMH uses its internal tube sensor; HMS uses a separate probe that must stay submerged above the heater. The manuals also describe a separate above-95°F audible alert, not an automatic overheat power cut-off. These details are not a reason to operate beyond instructions or to select a livestock target.

The public questionnaire asks only 60–95°F, so its 50°F lower manual endpoint is outside the selectable form range. With only setpoint specified, the 93°F finder returns 32 models: seven conventional GH sizes, four GH PRO sizes, five HTG sizes, three current EX digital models, nine classic Jäger sizes and Fluval E50/E100/E200/E300. The Finnex families remain reference-only and do not appear. Compare conventional GH-50W and GH-300W with GH PRO 50 W, 300 W, Jäger 100 W and Fluval E100. At 94°F all 32 active models are outside their documented range and this library returns no candidate. See the setting-only 93°F result and the 94°F result. With in-tank installation and adjustable control held constant at 93°F, the reviewed matcher also returns 32 active models, including all nineteen AquaTop GH, GH PRO, HTG and EX configurations, nine classic Jäger sizes and Fluval E50/E100/E200/E300. See those same in-tank/adjustable conditions and the same conditions at 94°F. See the separate HMH-100S and HMS-100S manual-based reviews for model details.

Decision: Finnex HMH/HMS manuals allow 93–94°F settings but their low-water cutoff is limited to 58–92°F; with in-tank adjustable conditions the 32 active models at 93°F become a scoped zero-result set at 94°F, and neither reference-only Finnex family is a match.

QPH dial endpoints are setting limits, not an actual-water guarantee

Decision: AquaTop’s 2022 cutsheet lists an inclusive 68–93°F adjustable setting range for every QPH size; 67°F is below and 94°F above that documented interval, and none of the five QPH references becomes an active finder result even at an in-range setting.

• At 67°F, QPH is below its 68°F lower endpoint; a current Fluval M100 match does not make a QPH model an active result. Check 67°F and read M100.
• At 68°F, QPH is at its documented lower endpoint but remains reference-only; an active EX-100 is a separate model with its own fact record. Check 68°F and read EX-100.
• At 93°F, QPH reaches its documented upper endpoint but none of the five reference models is an active match; compare the active EX-100 record. Check 93°F and read EX-100.

At 67°F, the QPH range is not reached; a current Fluval M100 match does not make the QPHs a match. At 68°F, the QPH lower setting endpoint is included in its source range but reference-only status keeps those configurations out; compare an active EX-100 review. At 93°F, QPH’s documented upper endpoint is included, but the models remain references. No current active candidate in this researched library documents a 94°F setting; all five QPH models are references, so the published 68–93°F dial does not make them active matches. Check the same setpoint-only finder at 94°F.

These four finder links hold every other answer open. QPH’s analog dial is not a digital reading of actual aquarium water, no numerical control-accuracy tolerance is documented, and a dial setting is not species-specific temperature advice. Read the QPH comparison and exact QPH-50, QPH-100, QPH-200, QPH-300 and QPH-400 assessments for the shared control claim and model differences.

When the body must be documented as shatterproof

In brief: Five models have a documented shatterproof-body claim: Aqueon Flat 5 W/7.5 W and Fluval P10/P25/P50. See the same-condition shatterproof result; the Fluval models are presets, while the Aqueon pages do not state a thermostat setting range.

AquaTop describes TH-C100/200/300/400/500/800 as titanium heaters, but none of the reviewed exact pages calls the heater body shatterproof or gives an impact rating. Titanium is not substituted for the explicit claim this required option demands, so no TH-C size joins the five matches. See the same-condition shatterproof result and read the TH-C source limits.

AquaTop calls QPH's quartz glass shatter-resistant, not shatterproof, and the reviewed manual/cutsheet do not establish an impact rating or a separate included heater guard. Leave the hard body-protection field unknown; none of the five QPH sizes satisfies this requirement. Their exact construction wording is summarized in the QPH comparison.

The TTH-1000 and TTH-1500 also identify titanium construction without an exact shatterproof or impact rating. The first-generation TH-800W page uses broad durability language about its titanium series, but it does not document a shatterproof standard; all three new entries remain references and none adds to the five active results. Read the TTH-1000, TTH-1500 and first-generation TH-800W/DDC-800 evidence, then use the same-condition shatterproof finder.

The THH source describes a titanium heater element and guard, not a manufacturer-verified shatterproof body. A metal element or separate guard is not equivalent to the explicit body claim represented by the finder's required shatterproof option; none of the three THH references increases its five active matches. See the separate THH-300S, THH-500S and THH-800S evidence reviews.

“Has a guard,” “impact resistant” and “shatterproof body” are different claims. Fluval describes its P heaters as shatterproof polymer construction; Aqueon calls its Flat 5 W and 7.5 W bodies shatterproof but does not identify their material. The 15 W reference also has a shatterproof claim but is omitted from finder results because its 4–10-gallon range includes a lower bound the matcher cannot enforce. In contrast, the four Aqueon Preset cartons call their glass construction shatter-resistant, not shatterproof; they do not satisfy this hard option. The E Series guard covers a glass heater core, the T Series guard is additional protection around a glass unit, and the seven AquaTop GH models also have glass bodies without documentation here of a shatterproof claim. The five HTG heaters likewise combine a glass heater with a protective cage, but AquaTop does not call the body shatterproof; see their family comparison and individual HTG-50, HTG-200 and HTG-400 reviews. EHEIM's classic e, WLAN thermocontrol+ e and Jäger models likewise use glass without documentation of a shatterproof heater body. An impact-resistance description is not the same as a shatterproof-body claim.

Finnex describes HMH and HMS as titanium heaters and lists a separate guard. The reviewed manuals/family pages do not explicitly say that the whole heater body is shatterproof, so a metal element and guard cannot establish that the model meets this hard requirement. The twelve HMH/HMS rows stay reference-only and do not change the five documented matches; see the HMH-50S, HMH-500S, HMS-50S and HMS-500S evidence reviews.

Decision: If a shatterproof heater body is essential, the current matcher library has five documented matches: Aqueon Flat 5 W and 7.5 W and Fluval P10, P25 and P50. The three P models are fixed at 76–78°F; neither current Aqueon flat page publishes a user thermostat type or setting range. See every documented shatterproof match. Compare the Aqueon Flat 5 W and 7.5 W with P10, P25 and P50 by their separate capacity limits and documented controls; confirm that the chosen model's published control behavior suits your independently established target.

The Pisces PCS pages call their tubing heat-resistant quartz, but do not claim a shatterproof body. PCS-10W and PCS-25W are excluded from this hard requirement rather than receiving credit for their material description; check the 10 W and 25 W evidence reviews.

OASE describes HeatUp's glass tube as quartz and makes a relative temperature-resistance statement, but the reviewed US pages do not document a shatterproof body. All seven remain absent when this hard requirement is selected. Compare the exact-material and construction limits on the HeatUp 25, 200 W or other HeatUp reviews; “quartz,” “temperature-resistant” and “shatterproof” are not interchangeable claims.

AquaTop's exact TQ pages do not characterize a shatterproof body, and the model-specific source record leaves heater-body material unknown. “Thermo-Quartz” in the product name is not a shatterproof claim. Therefore TQ-100W, TQ-200W and TQ-250W are not added to the required-shatterproof results; see the TQ evidence comparison for the exact scope limit.

Adjustable setting and shatterproof body together

Requiring both features creates a real conflict in the current reviewed set: Fluval M, E and T models, the classic Jäger sizes, EHEIM thermocontrol e, the four WLAN thermocontrol+ e Types and all seven OASE HeatUp sizes and all seven adjustable AquaTop GH glass sizes and the five HTG guarded-glass heaters lack a documented shatterproof-body claim, while the P bodies are documented as shatterproof but use a fixed preset. Aqueon's Flat 5 W and 7.5 W have shatterproof claims but no published setting mode or range; the 15 W has a similar source-backed body claim but is a reference-only entry and has no published setting. The four PS-series Preset references have a fixed 78°F point but only a shatter-resistant glass claim, so they provide neither adjustable control nor documented shatterproof construction.

Decision: At 78°F, adjustable heaters can accept the setting, but the current reviewed US library has no model that documents both an adjustable thermostat and a shatterproof body; adjustable Fluval and EHEIM glass models—including the classic e, WLAN thermocontrol+ e and Jäger families—AquaTop GH, GH PRO and all five HTG guarded-glass models, and all seven OASE HeatUps lack that shatterproof-body evidence. The shatterproof P models are preset and Aqueon's control mode is not published. Check the exact adjustable, 78°F and shatterproof combination before deciding which requirement, if any, can change.

No reviewed matcher candidate meets both requirements together: adjustable Fluval, EHEIM and OASE glass designs lack a documented shatterproof-body claim, the documented shatterproof P models are fixed at 76–78°F, and Aqueon Flat 5 W and 7.5 W have no published control-mode evidence. The Flat 15 W reference is not a matcher result because its lower tank-volume boundary cannot be enforced. See the Aqueon 5 W, 7.5 W and 15 W reference for their exact capabilities and gaps.