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 bestAquarium Heater 20 Gallonof November 2025

112M consumers helped this year.

33% 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

10.0

View Product
Buy it on Amazon

2

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

10.0

View Product
Buy it on Amazon

3

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

9.8

View Product
Buy it on Amazon

4

Aqueon Adjustable PRO Aquarium Heater
Aqueon Adjustable PRO Aquarium Heater

Aqueon

9.5

View Product
Buy it on Amazon

5

Fluval T100 Fully Electronic Aquarium Heater, 100W, up to 30 US Gal / 100 L
Fluval T100 Fully Electronic Aquarium Heater, 100W, up to 30 US Gal / 100 L

Fluval

9.3

View Product
Buy it on Amazon

Related products

Aquael Ultra Aquarium Heater - for Freshwater and Saltwater Aquariums (75 Watt / 9-20 Gallons)

Aquael Ultra Aquarium Heater - for Freshwater and Saltwater Aquariums (75 Watt / 9-20 Gallons)

View Deal
Aqueon 100528680 Glass Adjustable Heater, 50 Watt

Aqueon 100528680 Glass Adjustable Heater, 50 Watt

View Deal
Hagen Fluval Marina Submersible Heater for Aquarium, 100W

Hagen Fluval Marina Submersible Heater for Aquarium, 100W

View Deal
KINGYEENUO 50W Submersible Aquarium Heater, Used for 10-20 Gallons Tank, Adjustable Fish Turtle Tank Heater, with External Temperature Controller, Built-in Digital Display Thermometer, Smart Memory

KINGYEENUO 50W Submersible Aquarium Heater, Used for 10-20 Gallons Tank, Adjustable Fish Turtle Tank Heater, with External Temperature Controller, Built-in Digital Display Thermometer, Smart Memory

View Deal

6

Abhirsh Aquarium Heater 50 Watt - Reliable Fish Tank and Immersion Water Heater, Adjustable Temperature Submersible Thermostat Heater for 5-10 Gallon
Abhirsh Aquarium Heater 50 Watt - Reliable Fish Tank and Immersion Water Heater, Adjustable Temperature Submersible Thermostat Heater for 5-10 Gallon

Abhirsh & Design

9.0

View Product
Buy it on Amazon

15% off

7

hygger Newly Quartz Fully Submersible Aquarium Heater, 100W/2002/300W/500W/800W Fish Tank Heater with LED Display Controller for 10-190 Gallons Marine and Freshwater (100W for 10~25 Gallon)
hygger Newly Quartz Fully Submersible Aquarium Heater, 100W/2002/300W/500W/800W Fish Tank Heater with LED Display Controller for 10-190 Gallons Marine and Freshwater (100W for 10~25 Gallon)

hygger

8.7

View Product
Buy it on Amazon

8

Eheim Jager TruTemp Submersible Heater - 50 W
Eheim Jager TruTemp Submersible Heater - 50 W

Eheim

8.4

View Product
Buy it on Amazon

9

Aqueon Submersible Aquarium Heater, 100 Watts, Up to 40 Gallons
Aqueon Submersible Aquarium Heater, 100 Watts, Up to 40 Gallons

Aqueon

8.1

View Product
Buy it on Amazon

10% off

10

SainSmart XpertMatic Submersible Aquarium Heater, 100W Adjustable Fish Tank Heater Thermostat with Suction Cup, for Marine Saltwater and Freshwater, Up to 20 Gallon Fish Tanks
SainSmart XpertMatic Submersible Aquarium Heater, 100W Adjustable Fish Tank Heater Thermostat with Suction Cup, for Marine Saltwater and Freshwater, Up to 20 Gallon Fish Tanks

sainsmart

7.8

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