Fish Tank Heaters

Whether you're looking for a fish tank heater for your Betta's mini-aquarium, or a robust submersible solution that's safe for fresh and saltwater use, we've got you covered. The type of heating you choose will be determined by the type of fish and other inhabitants in your tank. If you have a marine or reef tank, be sure to choose one that is appropriate for saltwater. Corals are particularly sensitive to temperature fluctuations, so make sure you have the right type of heater and the right number. If your tank is over 55 gallons, or you have sensitive fish, corals or other invertebrates, you may need a secondary heater. Submersible aquarium heaters are submerged entirely in the water, efficiently heating both large tanks and mini-aquariums, such as Betta tanks. Some small (under 5 gallon) tanks can be heated with an external heater underneath the aquarium. With heaters from top brands, our collection allows you to precisely regulate their habitat and provide your fish with a constant (and comfortable) water temperature, you can help them thrive. Explore our newest selection of heaters for fish tanks large and small to help your fish live longer and healthier lives.