We Use CookiesWe use cookies to enhance the security, performance, functionality and for analytical and promotional activities. By continuing to browse this site you are agreeing to our privacy policy

All Categories

Pet Supplies

Fish & Aquatic Pets

Aquarium Heaters

10 Best Aquarium Heaters 2025 in the United States

Name: Orlushy Submersible Aquarium Heater,300W Adjustable Fish Tahk Heater with 2 Suction Cups Free Thermometer Suitable for Marine Saltwater and Freshwater
Brand: Orlushy
Price: 25.99 USD
Availability: InStock

From leading brands and best sellers available on the web.

Winner

Orlushy

Orlushy Submersible Aquarium Heater,300W Adjustable Fish Tahk Heater with 2 Suction Cups Free Thermometer Suitable for Marine Saltwater and Freshwater

9.8

score

View on Amazon

Orlushy

Orlushy 25W Small Submersible Aquarium Heater, Constant Temperature Betta Fish Tank Heater of 78℉for 1-6 Gallons Freshwater & Saltwater Tanks

9.6

score

View on Amazon

Tetra

Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon

9.4

score

View on Amazon

HiTauing

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

9.2

score

View on Amazon

Tetra

Tetra 26446 HT Submersible Aquarium Heater With Electronic Thermostat, 100-Watt, Multicolor, 10-30 Gallon

8.9

score

View on Amazon

PULACO

PULACO 25W Small Aquarium Submersible Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉)

8.7

score

View on Amazon

Fluval

Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal.

8.4

score

View on Amazon

Tetra

Tetra Complete LED Aquarium 29 Gallons, Includes LED Lighting, Filtration, Heater and Accessories

8.2

score

View on Amazon

DaToo

DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker

7.9

score

View on Amazon

#10

Fluval

Fluval E 300 Watt Electronic Heater

7.6

score

View on Amazon

How do we rank products for you?

Our technology thoroughly searches through the online shopping world, reviewing hundreds of sites. We then process and analyze this information, updating in real-time to bring you the latest top-rated products. This way, you always get the best and most current options available.

10 Best Aquarium Heaters 2025 in the United States

Orlushy Submersible Aquarium Heater,300W Adjustable Fish Tahk Heater with 2 Suction Cups Free Thermometer Suitable for Marine Saltwater and Freshwater

Orlushy 25W Small Submersible Aquarium Heater, Constant Temperature Betta Fish Tank Heater of 78℉for 1-6 Gallons Freshwater & Saltwater Tanks

Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon

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

Tetra 26446 HT Submersible Aquarium Heater With Electronic Thermostat, 100-Watt, Multicolor, 10-30 Gallon

PULACO 25W Small Aquarium Submersible Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉)

Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal.

Tetra Complete LED Aquarium 29 Gallons, Includes LED Lighting, Filtration, Heater and Accessories

DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker

Fluval E 300 Watt Electronic Heater

FAQ

What is the best aquarium heater for a 20-gallon tank?

How do I properly install an aquarium heater?

What are the most reliable aquarium heater brands?

Are aquarium heaters safe to use?

What size heater do I need for my aquarium?

10 Best Aquarium Heaters 2025 in the United States

Orlushy Submersible Aquarium Heater,300W Adjustable Fish Tahk Heater with 2 Suction Cups Free Thermometer Suitable for Marine Saltwater and Freshwater

Orlushy 25W Small Submersible Aquarium Heater, Constant Temperature Betta Fish Tank Heater of 78℉for 1-6 Gallons Freshwater & Saltwater Tanks

Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon

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

Tetra 26446 HT Submersible Aquarium Heater With Electronic Thermostat, 100-Watt, Multicolor, 10-30 Gallon

Marineland Precision Submersible Heater, for Freshwater or Saltwater Aquariums, 250-watt

Eheim 3619090 Jager Aquarium Thermostat Heater 300W, Black

Aqueon Aquarium Fish Tank Preset Heater For Up To 40 Gallons, 100 Watts

Fluval T200 Fully Electronic Heater for Freshwater Aquariums up to 65 Gal.

FREESEA Aquarium Heater for Fish Tank: 300W Submersible Fish Tank Heater with Over-Temperature and Off-Water Protection for 40-75 Gallon Saltwater and Freshwater

PULACO 25W Small Aquarium Submersible Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉)

Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal.

Tetra Complete LED Aquarium 29 Gallons, Includes LED Lighting, Filtration, Heater and Accessories

DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker

Fluval E 300 Watt Electronic Heater

Jager Aquarium Heaters

Glass Aquarium Heaters

Diy Aquarium Heaters

Fish Aquarium Heaters

Mini Aquarium Heaters

FAQ

What is the best aquarium heater for a 20-gallon tank?

How do I properly install an aquarium heater?

What are the most reliable aquarium heater brands?

Are aquarium heaters safe to use?

What size heater do I need for my aquarium?