We use cookies to enhance the security, performance, functionality and for analytical and promotional activities. We use cookies to personalize ads for you. By continuing to browse this site you're agreeing to our Privacy PolicyWe use cookies to enhance your experience and personalize ads. By using the site, you agree to that. Privacy Policy

10 bestHeater For Fish Tank 20 Gallonof November 2025

112M consumers helped this year.

18% off

1

HiTauing Aquarium Heater, 50W/100W/200W/300W/500W Submersible Fish Tank Heater with Over-Temperature Protection and Automatic Power-Off When Leaving Water for Saltwater and Freshwater
HiTauing Aquarium Heater, 50W/100W/200W/300W/500W Submersible Fish Tank Heater with Over-Temperature Protection and Automatic Power-Off When Leaving Water for Saltwater and Freshwater

HiTauing

9.9

View Product
Buy it on Amazon

23% off

2

Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt
Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt

Tetra

9.8

View Product
Buy it on Amazon

3

NICREW Aquarium Heater 100W, Temperature Adjustable Fish Tank Heater with Controller for 10-20 Gallon, Overheat Protection
NICREW Aquarium Heater 100W, Temperature Adjustable Fish Tank Heater with Controller for 10-20 Gallon, Overheat Protection

NICREW

9.6

View Product
Buy it on Amazon

4

HiTauing Aquarium Heater, 100W Fish Tank Heater with LED Digital Display & 5 Safety Protection, Submersible Aquarium Heater with 2 Suction Cup and 5.9Ft Cord for 10-20 Gallon Fish Tank.
HiTauing Aquarium Heater, 100W Fish Tank Heater with LED Digital Display & 5 Safety Protection, Submersible Aquarium Heater with 2 Suction Cup and 5.9Ft Cord for 10-20 Gallon Fish Tank.

HiTauing

9.5

View Product
Buy it on Amazon

5

HiTauing Aquarium Heater, Upgraded 300W/500W Fish Tank Heater with Intelligent Leaving Water Automatically Stop Heating and Advanced Temperature Control System, Suitable for Saltwater and Freshwater
HiTauing Aquarium Heater, Upgraded 300W/500W Fish Tank Heater with Intelligent Leaving Water Automatically Stop Heating and Advanced Temperature Control System, Suitable for Saltwater and Freshwater

HiTauing

9.3

View Product
Buy it on Amazon

Related products

YukiHalu Small Submersible Aquarium Heater, Adjustable Mini Fish Tank Heater 25W 50W 100W 200W 300W with External Temperature Controller, LED Display, Used for 5/10/20/40/60 Gallons (25 Watts)

YukiHalu Small Submersible Aquarium Heater, Adjustable Mini Fish Tank Heater 25W 50W 100W 200W 300W with External Temperature Controller, LED Display, Used for 5/10/20/40/60 Gallons (25 Watts)

View Deal
Fish Tank Aquarium Heater - Adjustable Temperature Submersible Thermostat Heater,25W/50W/100W/150W/200W/300W

Fish Tank Aquarium Heater - Adjustable Temperature Submersible Thermostat Heater,25W/50W/100W/150W/200W/300W

View Deal
DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker, 1 Yr Warranty

DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker, 1 Yr Warranty

View Deal
YukiHalu Small Aquarium Heater 25/50/100/150W with Protective Cover, Mini Fish Tank Heater, External Controller, Temperature Adjustable, Digital Display, Used for 5/10/20/30 Gallons (25W-5Gallon)

YukiHalu Small Aquarium Heater 25/50/100/150W with Protective Cover, Mini Fish Tank Heater, External Controller, Temperature Adjustable, Digital Display, Used for 5/10/20/30 Gallons (25W-5Gallon)

View Deal

6

NICREW Submersible Aquarium Mini Heater, Small Betta Fish Tank Heater with Electronic Thermostat, 25W
NICREW Submersible Aquarium Mini Heater, Small Betta Fish Tank Heater with Electronic Thermostat, 25W

NICREW

9.1

View Product
Buy it on Amazon

7

hygger Aquarium Heater, 75W 150W 300W 500W 800W 1200W Submersible Fish Tank Water Heater Double Quartz Explosion-Proof with for Freshwater Saltwater Tank (300W for 30~80 Gallon)
hygger Aquarium Heater, 75W 150W 300W 500W 800W 1200W Submersible Fish Tank Water Heater Double Quartz Explosion-Proof with for Freshwater Saltwater Tank (300W for 30~80 Gallon)

hygger

8.8

View Product
Buy it on Amazon

8

hygger 200W Titanium Aquarium Heater for Salt Water and Fresh Water, Digital Submersible Heater with External IC Thermostat Controller and Thermometer, for Fish Tank 20-45 Gallon
hygger 200W Titanium Aquarium Heater for Salt Water and Fresh Water, Digital Submersible Heater with External IC Thermostat Controller and Thermometer, for Fish Tank 20-45 Gallon

hygger

8.6

View Product
Buy it on Amazon

9

Adjustable Mini Aquarium Heater 0.5-40 Gallon Submersible Small Fish Tank Heater Digital Display Thermostat External Temperature Controller 10W/20W/30W/25W/50W/100W/200W
Adjustable Mini Aquarium Heater 0.5-40 Gallon Submersible Small Fish Tank Heater Digital Display Thermostat External Temperature Controller 10W/20W/30W/25W/50W/100W/200W

YOFOTHS

8.3

View Product
Buy it on Amazon

10

Pawfly Submersible Aquarium Heater 50 W Betta Fish Tank Heater Adjustable Electronic Heating Rod with Thermostat Overheating Protection and Protective Cover for 10-20 Gallon Fish Tanks
Pawfly Submersible Aquarium Heater 50 W Betta Fish Tank Heater Adjustable Electronic Heating Rod with Thermostat Overheating Protection and Protective Cover for 10-20 Gallon Fish Tanks

Pawfly

8.1

View Product
Buy it on Amazon
subscribe-icon

Best Reviews Guide Newsletter

Get exclusive articles, recommendations, shopping tips, and sales alerts

By submitting your email address you agree to our Terms and Conditions and Privacy Policy