Do fish tanks need heaters?

Some fish tanks need heaters, while others do not. Coldwater fish do not require a fish tank heater, but tropical fish do need aquarium heaters to maintain the right water temperature.

Where is the best place to put an aquarium heater?

The best place to put an aquarium heater is near a filter outlet or inlet or near a circulation pump. This will help ensure more even heat distribution. Install the heater according to the product instructions and try to position decorations away from the heater so the heated water can circulate more freely.

Can you leave aquarium heaters on at all times?

You can usually leave aquarium heaters on at all times, as most have an internal thermostat that turns off the heat when the water reaches a specific temperature. Be sure to read and follow all the instructions for your particular fish tank water heater, including whether to leave it on constantly and how to properly adjust the water temperature.

How do I choose the right aquarium heater for my fish tank?

Choose the right aquarium heater for your fish tank by picking one that has the right amount of heating power for your tank. A good rule of thumb is 5 watts of heat per gallon of tank capacity if you have a tank lid and keep the aquarium in a room that isn't too cold. Many experts recommend choosing a fully submersible heater for greater placement versatility and a compact design that is easier to hide. Read aquarium heater product descriptions and reviews on our site to find out which ones might be best for your particular needs.

Fish Tank & Aquarium Heaters - Page 2 (Free Shipping)

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Aquael Platinium 50W Glass Heater

$30.57 Chewy Price

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Aquael Platinium 250W Glass Heater

$31.64 Chewy Price

$35.96 List Price

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Aquael Platinium 200W Glass Heater

$34.87 Chewy Price

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Aquael Platinium 75W Glass Heater

$31.05 Chewy Price

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Aquael Platinium 25W Glass Heater

$30.51 Chewy Price

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Hydor In-Line External Hose Aquarium Heater, Black, 300-watt, 5/8-in

$92.99 Chewy Price

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H2Pro Titanium Aquarium Heater, 300-watt

Rated 3.7 out of 5 stars

$67.30 Chewy Price

$74.99 List Price

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Fluval Electronic Aquarium Heater, 300-watt

Rated 3.6 out of 5 stars

$49.97 Chewy Price

$54.99 List Price

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Marina 6-in Submersible Fish Heater, 50-Watts

Rated 3.4 out of 5 stars

$23.97 Chewy Price

$32.99 List Price

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OASE Indoor Aquatics HeatUp 25 Adjustable Fish Heater

Rated 4 out of 5 stars

$29.86 Chewy Price

$33.99 List Price

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Aquatop Submersible Glass Aquarium Heater, 150-watt

Rated 3.6 out of 5 stars

$25.99 Chewy Price

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Fluval M 150Watt Submersible Fish Heater

$34.99 Chewy Price

$35.99 List Price

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Penn-Plax 10W Plastic Safe Aqiuarium Heater, 4-in

Rated 3.3 out of 5 stars

$13.10 Chewy Price

$16.99 List Price

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Cobalt Aquatics Neo-Glass Submersible Aquarium Heater, 300-watt

Rated 2.8 out of 5 stars

$33.10 Chewy Price

$51.41 List Price

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Aqueon Mini Aquarium Heater, 2-gal, 5 watt

Rated 3.5 out of 5 stars

$10.64 Chewy Price

$16.99 List Price

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Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 7-in, 50-watt

Rated 3.9 out of 5 stars

$18.99 Chewy Price

$28.99 List Price

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OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater

Rated 5 out of 5 stars

$45.53 Chewy Price

$53.99 List Price

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Fluval P25 Pre-Set Aquarium Fish Heater

Rated 4 out of 5 stars

$21.14 Chewy Price

$29.99 List Price

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Eheim Thermocontrol Aquarium Water Temperature Controller, 125-watt

Rated 2.6 out of 5 stars

$43.10 Chewy Price

$44.99 List Price

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Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt

Rated 2.7 out of 5 stars

$18.85 Chewy Price

$27.99 List Price

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Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 8-in, 75-watt

$18.99 Chewy Price

$28.99 List Price

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Aquatop Nano Aquarium Thermostat Heater, 15-watt

Rated 2.9 out of 5 stars

$25.99 Chewy Price

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Zoo Med BettaTherm Mini Size Betta Bowl Heater

Rated 1.8 out of 5 stars

$10.00 Chewy Price

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Aquascape Smart Fish Pond Thermometer

$79.99 Chewy Price

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Fluval Submersible Digital Fish Thermometer

Rated 1 out of 5 stars

$21.99 Chewy Price

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Hydor Betta Bowl Slim Fish Tank Heater

$13.99 Chewy Price

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OASE Indoor Aquatics HeatUp 200 Adjustable Fish Heater

Rated 5 out of 5 stars

$39.92 Chewy Price

$45.99 List Price

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Penn-Plax 25W Plastic Safe Aquarium Heater, 6-in

$15.99 Chewy Price

$26.99 List Price

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Fluval P10 Pre-Set Aquarium Fish Heater

Rated 2.5 out of 5 stars

$18.14 Chewy Price

$26.99 List Price

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Laguna Pond Thermometer, C&F Scale

Rated 5 out of 5 stars

$7.49 Chewy Price

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Free 1-3 day delivery on first-time orders over $35
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OASE Indoor Aquatics Biostyle Thermo 50 Fish Heater, Dark Blue

$101.99 Chewy Price

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OASE Indoor Aquatics HeatUp 100 Adjustable Fish Heater

Rated 3 out of 5 stars

$34.41 Chewy Price

$39.99 List Price

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Free 1-3 day delivery on first-time orders over $35
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OASE Indoor Aquatics Filtosmart Thermo 100 External Fish Heater

$138.99 Chewy Price

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Aquatop External Digital Dual Temp Display Thermometer

$9.99 Chewy Price

$32.99 List Price

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Fluval P50 Pre-Set Aquarium Fish Heater

Rated 1 out of 5 stars

$39.99 Chewy Price

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OASE Indoor Aquatics Biomaster Thermo 350 External Fish Heater

Rated 4.8 out of 5 stars

$319.99 Chewy Price

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Fish Tank & Aquarium Heaters

Aquael Platinium 50W Glass Heater

Aquael Platinium 250W Glass Heater

Aquael Platinium 200W Glass Heater

Aquael Platinium 75W Glass Heater

Aquael Platinium 25W Glass Heater

Hydor In-Line External Hose Aquarium Heater, Black, 300-watt, 5/8-in

H2Pro Titanium Aquarium Heater, 300-watt

Fluval Electronic Aquarium Heater, 300-watt

Marina 6-in Submersible Fish Heater, 50-Watts

OASE Indoor Aquatics HeatUp 25 Adjustable Fish Heater

Aquatop Submersible Glass Aquarium Heater, 150-watt

Fluval M 150Watt Submersible Fish Heater

Penn-Plax 10W Plastic Safe Aqiuarium Heater, 4-in

Cobalt Aquatics Neo-Glass Submersible Aquarium Heater, 300-watt

Aqueon Mini Aquarium Heater, 2-gal, 5 watt

Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 7-in, 50-watt

OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater

Fluval P25 Pre-Set Aquarium Fish Heater

Eheim Thermocontrol Aquarium Water Temperature Controller, 125-watt

Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt

Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 8-in, 75-watt

Aquatop Nano Aquarium Thermostat Heater, 15-watt

Zoo Med BettaTherm Mini Size Betta Bowl Heater

Aquascape Smart Fish Pond Thermometer

Fluval Submersible Digital Fish Thermometer

Hydor Betta Bowl Slim Fish Tank Heater

OASE Indoor Aquatics HeatUp 200 Adjustable Fish Heater

Penn-Plax 25W Plastic Safe Aquarium Heater, 6-in

Fluval P10 Pre-Set Aquarium Fish Heater

Laguna Pond Thermometer, C&F Scale

OASE Indoor Aquatics Biostyle Thermo 50 Fish Heater, Dark Blue

OASE Indoor Aquatics HeatUp 100 Adjustable Fish Heater

OASE Indoor Aquatics Filtosmart Thermo 100 External Fish Heater

Aquatop External Digital Dual Temp Display Thermometer

Fluval P50 Pre-Set Aquarium Fish Heater

OASE Indoor Aquatics Biomaster Thermo 350 External Fish Heater

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