What are fish tank heaters?

Fish tank heaters are underwater devices that maintain a desired temperature for your pet fish and surrounding aquatic life. To do this, heaters usually possess a thermostat. The thermostat monitors the water temperature, turning the heater on and off to maintain its optimal setting.

Are tank heaters safe for fish?

Yes, tank heaters are usually safe for fish, primarily because fish require stable water temperatures to survive. Many fish are cold-blooded by nature, so they depend on outside sources of heat to help in maintaining their body temperature.

Do aquarium heaters use a lot of electricity?

Aquarium heaters can use a good bit of energy, but the amount depends on several factors. These factors include: heater wattage, size of tank, heater cycling, filters, pumps, and lighting. Purchasing energy-efficiency tank equipment can help offset the electricity costs in many cases.

Do you leave a fish tank heater on all the time?

It's important that fish tank heaters be left on all the time. A heater is monitored by its thermostat, so it automatically turns on and off to maintain a consistent water temperature. That consistent water temperature is vital to the health of fish and underwater plants.

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

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Aqueon Mini Aquarium Heater, 2-gal, 5 watt

Rated 3.7 out of 5 stars

90

$14.45 Chewy Price

$16.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Farm Innovators Convertable Stock Tank De-Icer

Rated 4.6 out of 5 stars

27

$29.99 Chewy Price

$52.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Seapora Digital Thermometer with Probe

Rated 3.8 out of 5 stars

13

$13.35 Chewy Price

$16.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

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Tetra HT55 Submersible Aquarium Heater & Electronic Thermostat, 200-watt slide 2 of 5

Tetra HT55 Submersible Aquarium Heater & Electronic Thermostat, 200-watt slide 3 of 5

Tetra HT55 Submersible Aquarium Heater & Electronic Thermostat, 200-watt slide 4 of 5

Tetra HT55 Submersible Aquarium Heater & Electronic Thermostat, 200-watt slide 5 of 5

Tetra HT55 Submersible Aquarium Heater & Electronic Thermostat, 200-watt

Rated 4 out of 5 stars

41

$27.97 Chewy Price

$34.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Penn-Plax AquaLIFE Therma-Temp Digital Aquarium Thermometer, 2-in

Rated 3.9 out of 5 stars

66

$3.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Lifegard Adjustable Quartz Glass Heater Electronic Control, 50 watt

Rated 5 out of 5 stars

5

$32.99 Chewy Price

Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Apr 13 and Apr 17

Fluval M 200Watt Submersible Fish Heater

Rated 4.3 out of 5 stars

24

$36.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

GloFish Submersible Fish Heater, 50-watts

Rated 4.1 out of 5 stars

23

$17.47 Chewy Price

$22.49 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Instant Ocean Testing Hydrometer for Aquariums, 1 count

Rated 4 out of 5 stars

37

$11.99 Chewy Price

$13.69 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

OASE Indoor Aquatics HeatUp 200 Adjustable Fish Heater

Rated 4.7 out of 5 stars

3

$48.82 Chewy Price

$48.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Fluval M 150Watt Submersible Fish Heater

Rated 4.3 out of 5 stars

8

$34.99 Chewy Price

$35.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Aqueon Aquatic Flat Heater, 15-watt

Rated 3.6 out of 5 stars

54

$17.45 Chewy Price

$20.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Fluval P10 Pre-Set Aquarium Fish Heater

Rated 4.2 out of 5 stars

21

$22.79 Chewy Price

$26.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Marina Betta Submersible Aquarium Heater

Rated 3.9 out of 5 stars

70

$12.98 Chewy Price

$17.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Seapora Quartz Aquarium Heater, 300-watt

Rated 4 out of 5 stars

5

$25.38 Chewy Price

$26.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

K&H Pet Products Thermo-Pond

Rated 3.9 out of 5 stars

38

$59.73 Chewy Price

$98.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

JBJ Aquarium Truetemp Titanium Aquarium Heater, Black, 300-watt

$111.00 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

biOrb Aquarium Heater Pack

Rated 5 out of 5 stars

1

$47.99 Chewy Price

$52.99 List Price

Autoship Price

Free delivery on first-time orders
Free 365-day returns
Arrives between Apr 11 and Apr 16

Laguna Power Heat Heated De-Icer, 315W

Rated 4.3 out of 5 stars

23

$54.77 Chewy Price

$90.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Aquatop Nano Aquarium Thermostat Heater, 15-watt

Rated 2.9 out of 5 stars

15

$12.99 Chewy Price

$25.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

OASE Indoor Aquatics Biomaster Thermo 350 External Fish Heater

Rated 4.7 out of 5 stars

20

$319.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Tetra Pond De-Icer, 300-watt

Rated 4.3 out of 5 stars

95

$34.49 Chewy Price

$73.19 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

New

ASF Reef Evolution Hydrometer

$20.00 Chewy Price

$22.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Penn-Plax Aquarium LED Display Heater, 300W

Rated 2.4 out of 5 stars

5

$32.99 Chewy Price

$64.99 List Price

Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Apr 11 and Apr 14

Hydor Theo Shatterproof Aquarium Heater, 150-watt

Rated 3.4 out of 5 stars

43

$31.64 Chewy Price

$41.95 List Price

Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Apr 11 and Apr 15

Marina 10.5-in Submersible Fish Heater, 150-Watts

Rated 4.2 out of 5 stars

6

$27.99 Chewy Price

$39.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

K&H Pet Products Thermo-Pond Perfect Climate Deluxe Pond Deicer, 1500 Watt

Rated 3.7 out of 5 stars

111

$45.49 Chewy Price

$91.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

New

JBJ Aquarium Nano Arctica E-Chiller, White/Black, 20-gal

$438.00 Chewy Price

($21.90/gl) Price per Unit

Autoship Price

Free delivery on first-time orders
Free 365-day returns
Arrives between Apr 12 and Apr 16

Zoo Med BettaTherm Mini Size Betta Bowl Heater

Rated 2.3 out of 5 stars

11

$15.70 Chewy Price

$21.43 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Laguna Pond Heater, 500W

Rated 3.7 out of 5 stars

6

$84.95 Chewy Price

$153.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Fluval Sea Aquarium Hydrometer, Medium

Rated 2.5 out of 5 stars

6

$14.14 Chewy Price

$14.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

OASE Indoor Aquatics HeatUp 400 Adjustable Fish Heater

Rated 4.5 out of 5 stars

2

$57.99 Chewy Price

$62.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders
Free 365-day returns

Seapora Mini Desktop Aquarium Heater, 30-watt

Rated 2 out of 5 stars

1

$13.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Coralife Deep Six Aquarium Hydrometer

Rated 3 out of 5 stars

7

$13.99 Chewy Price

$14.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

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

Rated 3.2 out of 5 stars

6

$25.99 Chewy Price

$27.99 List Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Hydor Betta Bowl Slim Fish Tank Heater

Rated 3.3 out of 5 stars

12

$13.99 Chewy Price

Autoship Price

Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

Aquarium & Fish Tank Heaters & Thermometers

Aqueon Mini Aquarium Heater, 2-gal, 5 watt

Farm Innovators Convertable Stock Tank De-Icer

Seapora Digital Thermometer with Probe

Tetra HT55 Submersible Aquarium Heater & Electronic Thermostat, 200-watt

Penn-Plax AquaLIFE Therma-Temp Digital Aquarium Thermometer, 2-in

Lifegard Adjustable Quartz Glass Heater Electronic Control, 50 watt

Fluval M 200Watt Submersible Fish Heater

GloFish Submersible Fish Heater, 50-watts

Instant Ocean Testing Hydrometer for Aquariums, 1 count

OASE Indoor Aquatics HeatUp 200 Adjustable Fish Heater

Fluval M 150Watt Submersible Fish Heater

Aqueon Aquatic Flat Heater, 15-watt

Fluval P10 Pre-Set Aquarium Fish Heater

Marina Betta Submersible Aquarium Heater

Seapora Quartz Aquarium Heater, 300-watt

K&H Pet Products Thermo-Pond

JBJ Aquarium Truetemp Titanium Aquarium Heater, Black, 300-watt

biOrb Aquarium Heater Pack

Laguna Power Heat Heated De-Icer, 315W

Aquatop Nano Aquarium Thermostat Heater, 15-watt

OASE Indoor Aquatics Biomaster Thermo 350 External Fish Heater

Tetra Pond De-Icer, 300-watt

ASF Reef Evolution Hydrometer

Penn-Plax Aquarium LED Display Heater, 300W

Hydor Theo Shatterproof Aquarium Heater, 150-watt

Marina 10.5-in Submersible Fish Heater, 150-Watts

K&H Pet Products Thermo-Pond Perfect Climate Deluxe Pond Deicer, 1500 Watt

JBJ Aquarium Nano Arctica E-Chiller, White/Black, 20-gal

Zoo Med BettaTherm Mini Size Betta Bowl Heater

Laguna Pond Heater, 500W

Fluval Sea Aquarium Hydrometer, Medium

OASE Indoor Aquatics HeatUp 400 Adjustable Fish Heater

Seapora Mini Desktop Aquarium Heater, 30-watt

Coralife Deep Six Aquarium Hydrometer

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

Hydor Betta Bowl Slim Fish Tank Heater

Category

Thermometers

Tank Heaters

Product Type

Aquarium Type

Brand

Fish Type

Price

Customer Rating