Best AQUARIUM HEATERS
At Aquarium Accessories Reviews, we take pride in our rigorous review process. Each product is handpicked based on market research, personally tested by our experienced team for functionality and durability, and evaluated for value for money. Alongside our hands-on experience, we also consider real user feedback. This meticulous approach ensures we provide honest, transparent, and comprehensive reviews to guide your aquarium accessory purchases.
1
Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon
Tetra Store
4.4 ✓
2
Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal.
Fluval Store
4.6 ✓
3
EHEIM Jager Aquarium Thermostat Heater 100W ( Pack of 1)
Brand: Eheim
4.5 ✓
4
Fluval E300 Advanced Electronic Heater, 300-Watt Heater for Aquariums up to 100 Gal., A774
Fluval Store
4.4 ✓
5
EHEIM Jager Aquarium Thermostat Heater 150W
Brand: Eheim
4.4 ✓
6
Marineland Precision Heater for Saltwater or Freshwater Aquariums
MarineLand Store
4.3 ✓
7
Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts
Aqueon Store
4.4 ✓
8
Hitop 50W/100W/300W Adjustable Aquarium Heater, Submersible Glass Water Heater for 5 – 70 Gallon Fish Tank (50W for 5-15 Gallon)
HITOP-Fish Store
4.5 ✓
9
MQ Titanium Alloy 500W Aquarium Heater for Salt and Fresh Water, Digital LED Display Submersible Heater with External Thermostat Controller, for Fish Tank 70-80 Gallon
MQ Store
4 ✓
10
FREESEA 25 Watt Aquarium Betta Fish Tank Heater with Aquarium Submersible Thermometer
FREESEA Store
4.2 ✓
We will continue to update this buyer's guide once a month or two.
The best AQUARIUM HEATERS in 2024 - Detailed Product Descriptions
1. Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon
By Tetra Store
More PhotoAll Tetra HT heaters have indicator lights to let you know when the heater is on. It will be red when heating and green when the proper temperature has been reached.
The HT10 uses a built in electronic theromstat to automatically maintain water at 78° F which is ideal for most tropical fish. No adjustment is requried.
Ideal for aquariums between 2 to 10 gallons with hoods or glass canopies
The HT heater is fully submersbile and can be installed vertically or horizontally. It's small footprint makes it easy to conceal behind plants or other décor.
Please read all label information upon delivery. DO NOT plug heater into an electrical outlet until it is placed inside the aquarium.
2. Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal.
By Fluval Store
Modern Aesthetic: M-Series heaters combine modern aesthetics with reliable Italian construction. Employing an ultra-slim profile, these heaters are a welcome departure from traditional, bulkier designs.
Reflective Design: This heater is encompassed in a heat-and-shock resistant reflective Borosilicate glass tube, which allows it to reflect the surrounding aquarium colors, allowing it to blend in with the environment and enhance overall aesthetics.
Temperature Control: Computer-calibrated thermostat has an easy-to-adjust temperature control dial and an on/off blue indicator light to display when it’s in use.
Slim Profile: Ultra slim design allows for easy installation in your aquarium tank.
Recommended Size: M50 underwater heater is ideal for freshwater and saltwater aquariums up to 15 gallons. Each M-Series heater comes with a 3-year limited warranty.
3. EHEIM Jager Aquarium Thermostat Heater 100W ( Pack of 1)
By Brand: Eheim
Fully submersible
Thermo safey control protects against running dry
Will automatically turn off when water level dips too low
TruTemp dial recalibrates the heater for precise temperature regulation
Made of shock resistant and shatter proof glass for fresh or marine water
On/Off indicator light for at-a-glance monitoring
4. Fluval E300 Advanced Electronic Heater, 300-Watt Heater for Aquariums up to 100 Gal., A774
By Fluval Store
Aquarium heater with dual temperature sensors provide accurate and real-time water temperatures
LCD temperature display available in both Fahrenheit and Celsius; with a range of 68 to 93 degrees Fahrenheit
Fast heat technology built with a safety shut-off and integrated fish guard to protect fish and invertebrates
Equipped with a slim profile mounting bracket and colored display alert system
5. EHEIM Jager Aquarium Thermostat Heater 150W
By Brand: Eheim
Fully submersible
Thermo safey control protects against running dry
Will automatically turn off when water level dips too low
TruTemp dial recalibrates the heater for precise temperature regulation
Made of shock resistant and shatter proof glass for fresh or marine water
On/Off indicator light for at-a-glance monitoring
6. Marineland Precision Heater for Saltwater or Freshwater Aquariums
This 300 watt heater is for aquariums up to 80 gallons. Adjustable temperature dial allows you to set the temperature 1 degree with every click.
Thermal Switch automatically turns off as temperature rises above an internal preset and turns back on once it cools down.
The advanced heating element contains a mica core surrounded by a mesh heating element for superior heat transfer with enhanced durability
Advanced mounting bracket securely attaches to glass and provides 3 window positions to view the temperature display
Easy to view sliding scale tells the exact temperature setting. Top dial view shows the setting from an additional location.
7. Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts
By Aqueon Store
Preset to 78 degree, accurate to plus/- 1 degree
No adjustment required
Shatter resistant
Fully submersible, auto shut-off when overheats, resets when cools down
LED light turns on when aquarium water is being heated
Ideal for aquariums up to 30 gallons
8. Hitop 50W/100W/300W Adjustable Aquarium Heater, Submersible Glass Water Heater for 5 – 70 Gallon Fish Tank (50W for 5-15 Gallon)
Explosion Proof: The aquarium heater is made of 2mm thickened quartz glass, 33% thicker than ordinary glass, explosion-proof, not easy to crack, which is very safe for people and aquatic animals.
Application: 50W water heater is suitable for 5 – 15 gallon tank, also suitable for both saltwater and freshwater, suitable for fish tanks and turtle tanks, must be completely submerged in water when using.
Accurate Temperature: The fish tank heater can be adjusted from 68°F to 93°F (20°C - 34°C), comes with a thermometer sticker, convenient to detect the water temperature without another pay.
Long Service Life: This fish heater adopts 8-slot multi-branched heating wire ceramic frame, shorter length, 7.8*1*1 in(20*2.5*2.5 cm), better heat dissipation, and can save more space for your fishes.
Complete Accessories and Warranty: This aquarium submersible heater comes with accessories you need, in addition to the thermometer, it comes with 3 suction cups, one for replacement, and offer 12 months warranty, giving you peace of mind after your purchase.
9. MQ Titanium Alloy 500W Aquarium Heater for Salt and Fresh Water, Digital LED Display Submersible Heater with External Thermostat Controller, for Fish Tank 70-80 Gallon
By MQ Store
Durable Titanium Tube - This aquarium heater is made of premium Titanium Alloy, double seal material, advanced design to ensure safe operation. It has explosion-proof function while being also shatterproof and waterproof.
Wide Temperature Range - The temperature of the heater can be adjusted between 20-34℃, 68-93F. It is suitable for many kinds of aquariums, fishes and amphibious turtles.
Easy Viewing and Safe Adjusting - It is easy and safe to adjust temperature by the external controller and the temperature will be shown on the LED screen of the heater.
Intelligent Temperature Control - It can ensure the temperature constant at the set point as it can adjust heating power automatically if there is any water temperature variation. So that it can avoid temperature mutation and protect fishes.
It will stop heating when the water temp reaches to the set temp, restart heating when the water temp is 1℉ less than the set temp. The heater is working when the indicator light is red.
10. FREESEA 25 Watt Aquarium Betta Fish Tank Heater with Aquarium Submersible Thermometer
★【25 Watt Heater】： This Aquarium heater is suitable for 1 to 5 gallons aquariums, Length - 6.8 inch,voltage 110-120V, power cord is 4.0 ft, please choose the right wattage aquarium heater according to our size chart.
★【Temperature range】: 63°F~95°F , It is very easy to adjust the temperature you need, we also deliberately give each customer a free diving thermometer, you can observe the water temperature of the fish tank at any time.
★【Intelligent temperature control】： Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating. Furthermore, Automatic safety shut-off feature, and overheating protection.
★【Note】: 1. Aquarium heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.,Please unplug the power supply when cleaning the fish tank or aquarium water changes. 2. Heater rod is suitable for people over 16 years of age. Children or minors should be under adult guidance or supervision.
★【SATISFACTION GUARANTEED】： Gain the confidence to go hard with us! Our Aquarium Heater is built with durability in mind and safety for every design, In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement. 12 Month Warranty and 24 Hour Professional After-sales Service.
11. Fish Tank Aquarium Heater - Adjustable Temperature Submersible Thermostat Heater,25W/50W/100W/150W/200W/300W
By Brand: Bnzaq
[PREMIUM SHATTERPROOF GLASS]Made of shatterproof glass and BPA-free plastic.Bnzaq aquarium heaters are fully submersible and safe for fish without any toxic substance producing.3 FREE artificial aquarium plants as ornament in your tank.
[NO LONGER CHILL YOUR FISH]Automatically regulate and maintain water temperature，imitate the original ecological environment for your tropical fish.Provided fish with warm water environment.Perfect to apply to fresh and salt water.
[ADJUSTABLE TEMPERATURE]Temperature range: 68°F~93°F.25W heater:suitable for fish tank within 7 gallons,Length:7.8".Easy to adjust temperature by the aquarium heater that suit more species of fish.
[AUTOMATIC CONSTANT TEMPERATURE]When water temperature reaches set value,the indicator light will be OFF and the heater will automatically stop heating.The heater will automatically start heating and indicator light will be ON if water temperature is low.You could place heater horizontally or vertically.
[ATTENTION]Please place the heater near place (filter or pump) of water flowing to keep more even water temperature.Unplug the heater 30 minutes early when changing the water for the fish tank.
12. Uniclife 200 Watt Aquarium Heater with Thermometer, Fish Tanks Heater for 25-50 Gallon
For 25-50 Gal Tanks: Measure 11.4 inches in length. Applicable for aquaculture and fresh, marine and tropical aquariums. Save your fish or plants from coldness to keep them vigorous.
Adjustable: Controllable temperature range from 68 °F to 93 °F (20-34 °C). Simply rotate the knob to freely regulate the temperature with deviations from ± 2 °F to ± 4 °F.
Detect Temp Timely: With a built-in thermostat, it will automatically keep the water at the set temperature. The extra thermometer sticker allows you to detect water temp at any time.
Heating Protection: Its indicator light turns red during working and automatically shuts off to stop heating when reaching the set temperature. No danger of overheating to your aquatics.
Reliable Material: The 2 mm extra thick shatterproof quartz glass can prevent electricity leakage. And the iron-chromium heating wires feature fast heating to warm your tank fitly.
13. YOFOTHS Aquarium Heater 25W/50W/100W/200W, Small Fish Tank Heater, Temperature Adjustable Mini Tank Heater for 1/5/10/20/30/40 Gallon, External Temperature Controller (50W(3-10Gallon))
【50Watts Small Fish Tank Heater】 This Aquarium Heater is suitable for 5-10 gallons tanks, Mini size can well fit your mini tanks. Voltage 110-120V, power cord length is 52”, Suitable for freshwater and saltwater. Meet the growth temperature for turtle, Fighting fish,Guppy, Goldfish, Neon Tetra, Gourami, Peaceful Betta, Pterophyllum, Dwarf Gourami, Pterophyllum Scalare, Betta Smaragdina, Koi, Corydoras, Anabantoidei, Paradise Fish, Clownfish,swordtail….
【Precise and Constant Temperature】An intelligent IC chip controls the heater’s temperature. The temperature accuracy is 1℉. The fish heater will automatically start heating when the water temperature is lower than the set values and stop heating when the water temperature reaches the target.
【External Temperature Controller】Adjust the temperature from 64℉ to 93℉, This submersible heater is adjusted by an external controller, which you can mount on the outside edge of the tank. It’s convenient and safe for you to set the temperature, No need to put your hands in the water to adjust the Aquarium Heater temperature.
【Prevent for Over Heating and Out of Water Protection】 The heater will cut off power and stop heating automatically when the fish tank heater is out of water or the water temperature is over 95F. ‘E1’ error code will be shown. The function recovered when the heater is 100% immersed in water or the water temperature goes down to below 93℉.
【Notice】During its heating time, heater must be 100% immersed into the water. Please unplug the power supply when cleaning the fish tank or aquarium water changes. Heater rod is suitable for people over 16 years of age. Children or minors should be under adult guidance or supervision to use.
14. Cobalt Aquatics Neo-Therm Pro Aquarium Heater (50 watt), Fully-Submersible Freshwater, Saltwater, Thermostat, Thermometer, Shatterproof
Electronic thermostat from 68°F up to 94°F, accurate to ±0.5°F
AUTO SHUT-OFF circuitry prevents overheating.
SHATTERPROOF outer casing make the NEO-THERM PRO heaters virtually indestructible.
LED DISPLAY for both Set Tamp and Tank Temp, simultaneously.
FULLY Submersible heater
15. hygger ETL Certification Aquarium Heater, 50W/100W/200W/300W Submersible Fish Tank Thermostat Heater with Adjust Knob Suction Cup for Small Betta Coral Saltwater and Freshwater
By hygger Store
TEMP SETTING GUIDELINE: DO: Rotate left and right to adjust the temperature, easy to adjust, the range is 68℉~93℉. SEE: temperature scale setting guide bar. Working indicator light, plug in the power, the working state is more intuitive.
SAFETY CERTIFICATE: ETL Certification, hygger provide the most effective guarantee for your fish tank. Thickened Quartz Protective Glass; Bottom Protective Cover; Stable Suction Cup; Double Seal; Precision Welding; No Leakage Of Insulation;
WORKING PRINCIPLE: The hygger THERMOSTAT HEATER stops when the surrounding water temperature reaches the set temp, and starts to work when the surrounding water temp is low, and it cycles over and over again to achieve equilibrium. It is not a traditional heater that has been heated all the time.
PRODUCT PARAMETER: Cord Length: 5.9ft; Voltage:120V AC 60Hz; Watts:50W/100W/200W/300W; the temperature range is 68℉~93℉; Can be used in various tanks, coral saltwater, and small betta freshwater tanks.
QUALITY GUARANTEE: 2mm thick glass tube, heat conduction is more even, anti-collision, explosion-proof and corrosion-resistant, dual-purpose for betta freshwater and saltwater. The high-efficiency heating wires have a large area and are arranged tightly to increase the heating area and transfer the heat evenly.
16. AquaMiracle Adjustable 30W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 4-6 Gallon Tanks
SUPER MINI SIZE – This small aquarium heater is “thumb size” - only 2.36” (6cm) in length. Great for nano tanks / betta tanks. The innovative super mini size perfectly solves the headache of the fish keepers on the traditional heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93F, for 4-6 Gallon tanks.
ACCURATE TEMPERATURE – Thanks to the intelligent inverter technology, with the in-built chips this thermostat keeps the heater at a constant temperature at an accuracy of 1F, much more accurate than the traditional knob-controlled heaters. The thermostat shows 2 readings – the current temperature and the set temperature – very easy to operate.
DRY RUN / OVERHEATING PROTECTION – Full consideration of safety. With the multiple protections this fish tank heater will stop working when the water level is lower than the minimum water level or when the water temperature exceeds 97F. You are free from “cooking fish”!
MEMORY FUNCTION – The last setting is stored in the thermostat. In case of a power cut, when the power recovers the heater will follow the last setting.
MULTIPLE USES – This heater can be used for both fresh and marine water. It can be not only used as an aquarium heater, but can also work for turtles, pet fountains, and plant seedling.
17. AquaMiracle Adjustable 50W Aquarium Heater Submersible Fish Tank Heater Super Short Aquarium Heater with LED Digital Display Thermostat, for Tanks 5-10 Gallons
SUPER MINI SIZE – This aquarium heater is SUPER SHORT in length – might be the shortest heater in the market. It is only a bit more than HALF of the length comparing with the traditional fish heaters! The innovative super short length perfectly solves the headache of the fish keepers on the traditional aquarium heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93F.
ACCURATE TEMPERATURE – Thanks to the intelligent inverter technology, with the in-built chips the thermostat keeps the heater at a constant temperature at an accuracy of 1F, much more accurate than the traditional knob-controlled fish heaters. The thermostat shows 2 readings – the current temperature and the set temperature – very easy to operate.
DRY RUN / OVERHEATING PROTECTION – Full consideration of safety. With the multiple protections this fish tank heater will stop working when the water level is lower than the minimum water level (DRY RUN PROTECTION) or when the water temperature exceeds 97F (OVERHEATING PROTECTION). You are free from “cooking fish”!
MEMORY FUNCTION – The last setting is stored in the chips of the thermostat. In case of a power cut, when the power recovers the fish tank heater will follow the last setting.
MULTIPLE USES – This fish tank heater can be used for both fresh and marine water. It can be not only used as an aquarium heater, but can also work a turtle heater, pet fountain heater, and plant seedling heater.
18. ALLYLANG AQUA Mini Aquarium Heater 50W/100W Fish Tank Submersible Heater Turtle Heat Rod with Temperature Display External Temperature Controller for Betta Frogs Newts Turtles (50W(5~15gallon))
★ 【Temperature range】59°F~94°F, display Fahrenheit °F, this heater is designed for10~20 gallons tank. Upgrade function: The heater will auto shut off when it is out of water and turn normal when fully in water again.
★ 【Automatic constant temperature function】 when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating.
★ 【Touch button】 cyclic adjust temperature , easy to use and Safety.
★【Note】:this heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.
★【 satisfaction guarantee】Gain confidence and work with us! Our aquarium heaters are based on the concept of durability and the safety of each design. If you are not satisfied with our products, please contact us and we will be happy to provide you with a new replacement for aquarium heaters. 12-month warranty and 24-hour professional after-sales service.
19. auomii Small Submersible Aquarium Heater,Adjustable Mini Fish Tank Heater 25/50/100/150/200/300 Watts with External Temperature Controller, LED Display, Smart Memory, Used for 1-60 Gallons
【Automatic constant temperature, for 1-60 gallon tank】auomii aquarium heater is specially designed for mini fish tank for 1-60 gallon. The heating will be automatically stopped when the set temperature is reached. The rated voltage is 100-130V. Choose the right power of heater according to size chart.
【Easy to adjust, external temperature controller】Set the temperature via an external controller instead of submerging the hands in water and turning the dial. Avoid getting your hands wet or contaminating the tank. The temperature can be adjusted from 64 to 93°F with 1℉ accuracy because of Intelligent Frequency Conversion Technology
【Easy to install, ultra-small size heater】Thanks to the ultra-compact heater with powerful suction cup, it can be easily installed anywhere in the tank. This super small heater can be used for both saltwater and freshwater.
【Easy to read, thermometer inside】The water temperature will be displayed on the external controller in real time. No need another aquarium thermometer. Dual temperature sensors make temperature measurement more accurate.
【Safety, overheating protection】Prevent cooking fish as overheating protection. Stop heating automatically when overheating or lack of water. 30 days full refund, 12-months warranty.
20. HiTauing Aquarium Heater, 300W Fish Tank Heater with LED Digital Display & 5 Safety Protection, Submersible Aquarium Heater with 2 Suction Cup and 8.2Ft Cord for 40-75 Gallon Fish Tank.
【Aquarium Heater 300W】-- The 300 watt aquarium heater produces stable power with quick heat up. It's length is 10.6'', voltage 110-120V, power cord is 8.2ft. Aquarium heater for 40 to 75 gallons, ideal uses for the marine saltwater and freshwater, fish tanks, turtle tanks, betta tanks, small ponds, and so much more.
【Safe and Durable Fish Tank Heater】-- The components of this 300W fish tank heater are designed for safety and durability, and encased in a high-durability ABS shell. The nickel-chromium heating wire and quartz glass are made of high-temperature resistant materials, along with explosion-proof quartz sand, giving the product a high level of safety and durability.
【Comprehensive Protection Submersible Aquarium Heater】-- Our submersible aquarium heater have 2 intelligent protector to avoid damage to the product and its circuitry. ①Over max temp warning, when the temperature is higher than the maximum temperature 94℉/34℃, the code HH appears and automatically stop heating. ②Off-water warning, when the submersible aquarium heater is higher than the level of the fish tank water code E1 appears and automatically stop heating.
【Tank Heater with Digital Display and 2 Suction Cups 】-- Tank Heaterwith a digital display temperature control system, you can monitor the water temperature and set temperature in real time. Variable temperature settings range: 63-94℉/ 17-34℃. Press and hold the button 3S to switch ℉ and ℃. Each press will ±1℉. Red light is on when heating and green light is on when temperature is hold.
【Hitauing Submersible Water Heater Services】-- As a brand seller, our main purpose is to provide our dear customers with high quality aquarium heater and to take responsibility for your purchases. We promise to give you a 2-year warranty services from the date of purchase. If you have any problems with our submersible water heater in the future, please do not hesitate to let us know and we will do our best to help you slove it.
21. Kulife Fumak 25W Adjustable Aquarium Heater Super Short Submersible Fish Tank Heater Fish Heater with LED Digital Display Thermostat, for Tanks 3-5 Gallons
SUPER MINI SIZE – This aquarium heater is SUPER SHORT in length – might be the shortest aquarium heater in the market! It is only a bit more than HALF of the length of the traditional aquarium heaters! The innovative super short length perfectly solves the headache of the fish keepers on the traditional aquarium heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93F. 25 Watt for 3 - 5 Gallon tanks.
SUPER ACCURATE 1℉ – Thanks to the intelligent inverter technology, with the in-built chips the thermostat keeps the fish heater at a constant temperature at an accuracy of 1℉, much more accurate than the traditional knob-controlled fish heaters and you save your electricity expenses by 50%!
DIGITAL DISPLAY WITH DOUBLE TEMP. READINGS – This fish tank heater comes with an external thermostat with digital display that shows 2 readings – the current temperature and the set temperature – very easy to switch by pressing the SET button and you save an extra thermometer for current temperature measuring.
DRY RUN / OVERHEATING PROTECTION – Full consideration of safety. With the multiple protections this fish tank heater will stop working when the water level is lower than the minimum water level (DRY RUN PROTECTION) or when the water temperature exceeds 97F (OVERHEATING PROTECTION). You are free from “cooking fish”!
MEMORY FUNCTION – The last setting is stored in the chips of the thermostat. In case of a power cut, when the power recovers the fish heater will follow the last setting.
22. Dreyoo 2 Set Aquarium Fish Tank Heater, 300W Submersible Aquarium Heater with Thermometers and 4 Suckers, Adjustable Knob Aquarium Water Heater Built in Thermostat for 40-55 Gallon Aquariums
By Dreyoo Store
300W Aquarium Heater: suit for 40 to 55 gallon aquariums, the tank heater is 11" in length, 110-120V and 5 feet plug cable, the package comes with 2 pack fish tank heaters, 2 aquarium thermometers and several suckers
Adjustable Temperature: aquarium submersible heater has an exact temperature scale of 68 to 93 °F, complete control of the water climate within 1 degree of difference; Sensitive and reliable thermostat maintains uniform temperature, when red light on is heating, and automatic shutdown when temperature is reached
With 2 Aquarium Thermometers: the immersion probe with suction cup can be easily put into the water, allowing you to better observe the temperature of the fish tank; Immersion probe only, do not immerse the thermometer in water
Distinct Design: the aquarium water heater uses 2 mm thickened quartz glass, can be applied in fresh-water and saltwater aquariums, easy to hide in the tank, which is not easy to crack and safe for people and water animals
Note: the fish aquarium heater need to adjust temperature firstly, and then fix suction cup, and the heater must be completely immersed in the water, finally powered on; Also, if you want to clean tank water heater, and you should wait the heater to cool before removing it
23. hygger 100W Aquarium Heater, Ultra Short Quartz Fish Tank Heater with LED Digital Display Thermostat Controller for 5-26 Gallon Freshwater Saltwater Tank
By hygger Store
【Explosion-proof and anti-corrosion aquarium heater】Heating rod heating body is made of explosion-proof quartz glass, nickel-chromium heating wire and silicon carbide heat-conducting material, and the fish heater shield is made of high-temperature resistant ABS material. Manufactured into a tank heater that is anti-corrosion, non-leakage, non-conductive, explosion-proof, and makes water heating faster.
【Safety Guarantee】This full immersion aquarium heater build-in two temperature probe, when the fish heater is out of water or over temperature, it will automatically stop heating and send out a warning signal L1 or HH. And the heating rod will restart after it is completely submerged in water or cooled Work.
【INTELLIGENT THERMOSTAT】 When the actual temp is lower than the set temp of the fish tank heater by 1.5°F/1.5°C, the indicator light will turn red, the fish tank heater will heat up to the set temp at full power, and the indicator light will turn blue color, then stop heating.Temperature Ranging from 59℉ to 93℉.
【External Smart HD Controller】External controller with LED digital display, without getting hands wet. Each press of the submersible heater will change the set temperature by 1℉(1℃). Press and hold it for 5 seconds to toggle between Celsius and Fahrenheit.
【Full Submersible Heater】100w aquarium heater is suitable for 5-26Gal fish tank freshwater and saltwater tanks. Memory function it remembers the temperature you set it when the power fails. THREE suction cup bracket, can stably fix the heater in every corner of the fish tank.e changing water or removing heater. Make sure the heating rod is completely submerged in water and there is enough water flow and water circulation in fish tank when using the heater
