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fish Heating & Lighting Heaters

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  • Fluval® M-Series Submersible Heater

    Old Price $ 39.99

    Treats™ Members Enjoy Free Same Day Delivery Powered By Doordash

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  • 4 Sizes

    Top Fin® Pro Aquarium Heater

    Old Price $ 42.99 - 52.99

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  • Fluval® P Series Aquarium Heater

    Old Price $ 23.99

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  • Thrive Semi-Aquatic Submersible Heater

    Old Price $ 39.99

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  • Top Fin® Betta Tank Heater

    Old Price $ 17.99

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  • 3 Sizes

    Top Fin® Compact Aquarium Heater

    Old Price $ 24.99 - 34.99

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  • 5 Sizes

    Top Fin® Submersible Aquarium Heater

    Old Price $ 32.99 - 44.99

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  • Top Fin® Betta Aquarium Heater

    Old Price $ 19.99

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  • 3 Sizes

    Tetra HT Submersible Aquarium Heater

    Old Price $ 27.99 - 36.99

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  • 4 Sizes

    Marineland® Visi-Therm Submersible Aquarium Heater

    Discounted Price $ 38.24 - 46.74 Old Price $ 44.99 - 54.99

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    Sign In & Enjoy Free Shipping On Orders $49+ | Pick Up Curbside| Shipping Delays May Occur
  • 4 Sizes

    Aqueon® Submersible Aquarium Heater

    Old Price $ 28.77 - 34.17

    Sign In & Enjoy Free Shipping On Orders $49+ | Pick Up Curbside| Shipping Delays May Occur
  • 4 Sizes

    Fluval® Submersible Heaters

    Old Price $ 46.99 - 59.99

    Treats™ Members Enjoy Free Same Day Delivery Powered By Doordash

    Sign In & Enjoy Free Shipping On Orders $49+ | Pick Up Curbside| Shipping Delays May Occur
  • 4 Sizes

    Eheim Jager TruTemp Aquarium Heater

    Old Price $ 34.99 - 46.99

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    Sign In & Enjoy Free Shipping On Orders $49+ | Pick Up Curbside| Shipping Delays May Occur

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.
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