Best 20watt Aquarium Heater

FREESEA 50 Watt Aquarium Submersible Betta Heater with Aquarium Submersible Thermometer

★【50 Watt Heater】: This Aquarium heater is suitable for 5 to 15 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....

Check Stock

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 wi....

Check Stock

YukiHalu Submersible Aquarium Heater 100/150/200/300W, Small Size, Overheating Protection, External Temperature Controller, LED Display, Used for 20/30/40/60 Gallons (100Watts)

【100Watt for 10-20 gallons】YukiHalu 100W aquarium heater is designed for 10-20 gallons fish tank. Temperature can be accurately adjusted from 64 to 93°F. This heater works well in both saltwater and freshwater. Rated voltage 100-130V..
【Compact size】only 13cm/5 inches length for 100W and 150W heater, 19cm/7.5 inches for 200W heater and 23cm/9 inches for 300W heater. Fits mini fish tank, it takes up less space and easy to hide in the tank. Easy to install.
【Automatic thermostat at 1°F accuracy】The heater's working frequency will be changed according to temperature variation based on Intelligent Frequency Conversion Technology, and the heating is automatically stopped when the set temperature is reached..
【Overheating and lack of water protection】Stop heating automatically if the fish tank lack of water or overheating. Never cook your fish..
【External temperature controller】The temperature can be set by external controller, and the water temperature value is displayed on the LED display without the need for an additional aquarium temperature meter. The heat....

Check Stock

FREESEA 100 Watt Aquarium Fish Tank Heater with Aquarium Submersible Thermometer

★【100 Watt Heater】: This Aquarium heater is suitable for 15 to 25 gallons aquariums, Length - 13.5 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..
★【Explosion Proof】:★【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 min....

Check Stock

Orlushy 300W Submersible Aquarium Heater Fish Tank Heater with Adjustable Temperature and 2 Suction Cups for 30-55 Gallon Tank 6ft Power Cord

【300 Watt Aquarium Heater】: 300w aquarium heater is for 30-55 gallons fish tank, voltage 120V/60Hz, power cord 6(ft), heating rob length-11....
【Updated Design】: The aquarium heater is made of quartz glass, featuring corrosion-proof and explosion-proof. It adopts brand new structural....
【Intelligent Safety Protection】: When the indicator lamp is on, the heater starts to heat up the water. With automatic shut-off function and the....
【Wide Range of Application】: The heater is suitable for use in marine water or fresh water. With 2 strong suction cups, the heater can be....
【Tips】: 1.Please disconnect the power supply, remove the heater out the water after cooling it down for 10 minutes before cleaning the aquarium or....

Check Stock

DOMICA 25W Mini Aquarium Heater, Submersible Heater for Small Fish Tank (1-8 gallons) with Free Thermometer Sticker

AQUARIUM HEATER: Submersible heater is designed to keep your aquarium at the optimum temperature..
AUTOMATIC THERMOSTAT: Electronic thermostat keeps water at a consistent 78 degrees..
INDICATOR LIGHT: The red light shows when water is heating.
green indicates that the heater is on standby..
EASY TO USE: Just attach to an aquarium wall – the suction cup securely attaches heater to tank..
SIZE: Use this 50-watt heater for aquariums up to 10 gallons – UL Listed..

Check Stock

Aquarium Heater Small Fish Tank Heater Submersible 25W 50W 100W, Precise Temperature Control with Intelligent Memory Function, External LED Digital Temp Controller Suitable for Betta Fish Turtle

Built with Water Shortage Protection. SZELAM submersible aquarium heater is more sensitive and intelligent to resist water shortage. When the heater exposed to air or is not fully submerged, it will automatically power off and the external controller will display error code "E1"..
Small Aquarium Heater with Precise and Steady Temperature Control. Our aquarium heater has sensitive internal temp probe, which is more precise to control the water temp, making the temp difference within ±1℉ and providing suitable living environment for your aquatic creatures..
Top Quality Material Ensures More Safety. Made of heat-resistant thick quartz heating tube with black quartz sand, this upgraded fish tank heater features explosion-proof and anti-corrosion during heating, much safer than traditional heater. With SZELAM submersible aquarium heater, your beloved fishes will live happily during winter..
Safety Guarantee with CE & FCC Certification. SZELAM submersible fish heater is safe to your beloved fishes, as the power cord has CE & FCC Certification, which makes this aquarium heater much safer while heating better than other normal fish heater. Just try this, we won't let you down!.
25 Watt Small Fish Tank Heater. This 25W mini size (6"*1") submersible fish heater....

Check Stock

Orlushy 500W Submersible Aquarium Heater, Fish Tank Heater with Adjustable Temperature and 2 Suction Cups for 50-80 Gallon Tank 6ft Power Cord

【500 Watt Aquarium Heater】：500w aquarium heater is for 50-80 gallons fish tank, voltage 120V/60Hz, power cord 6(ft), heating rob length-13 inches.The temperature can be set to the values ranging from 68 to 93°F, please choose the right wattage aquarium heater according to our size chart.
【Updated Design】: The aquarium heater is made of quartz glass, featuring corrosion-proof and explosion-proof. It adopts brand new structural design and helps increase dispersing heat area and shorten the length of the heating rob, thereby raising heating efficiency by 20%.
【Intelligent Safety Protection】: When the indicator lamp is on, the heater starts to heat up the water. With automatic shut-off function and the thermostat inside, the heater maintains the tank water in stable and constant temp, automatically stop or start heating to keep the temp stability.
【Wide Range of Application】: The heater is suitable for use in marine water or fresh water. With 2 strong suction cups, the heater can be installed horizontally or vertically to the tank side and held in place well for aquariums, fish tanks, aquacultures and hydroponic systems.
【Tips】: 1.Please disconnect the power supply, remove the heater out the water after cooling it down for 10 minutes b....

Check Stock

ZHGSERVU 100W/300W/500W Aquarium Heater 500 Watt Fish Tank Heater Submersible Auto Thermostat Turtle Tank Heater 40-90 Gallon with Protective Sleeve and 3 Suckers

[Fully Submersible Aquarium Heater] This 500W 110V Strong Quartz Glass Betta Heater is suitable for aquariums from 50-90 gallons (180-340 liters).
300w fish heater suits for 35-80 gallons.
includes 150-200cm (5-6.5 feet) cable for easy use. The heater should be submersible fully under the water before turn on.
[Explosion-proof Shatterproof Shield-proof Design] Thanks to its high quality Quartz Glass material and its Protective Sleeve, aquarium heater is shatter resistant & more durable than conventional glass heaters.
[Provides Accurate Thermal Control] Set and adjust the desired temperature with the use of the Temperature Controller on the top. This allows accurate thermal control via the easy set thermostat for precise.
[Temperature Scale] Compact underwater analog turtle tank heater can be adjusted between 68°F~94°F (20°C~34.5°C). Maintain constant and stable temperatures for your aquatic creatures.
[Application] This 500 watt submersible water heater is great for both Fresh Water and Marine Water aquariums, aquaculture, terrariums & hydroponic systems. Suitable for ....

Check Stock