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Freshwater Aquarium Heaters & Thermometers

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Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 1 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 2 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 3 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 4 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 5 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 6 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 7 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 8 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 9 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 1 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 2 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 3 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 4 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 5 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 6 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 7 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 8 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 9 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 1 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 2 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 3 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 4 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 5 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 6 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 7 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 8 of 9
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt slide 9 of 9

Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt

Rated 4.3 out of 5 stars
110
$13.90 Chewy Price
$45.99 List Price
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Free 1-3 day delivery on first-time orders over $35
Free 365-day returns

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Aqueon Preset Aquarium Heater, 50-watt slide 1 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 2 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 3 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 4 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 5 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 6 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 7 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 8 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 9 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 1 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 2 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 3 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 4 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 5 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 6 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 7 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 8 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 9 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 1 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 2 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 3 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 4 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 5 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 6 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 7 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 8 of 9
Aqueon Preset Aquarium Heater, 50-watt slide 9 of 9

Aqueon Preset Aquarium Heater, 50-watt

Rated 3.6 out of 5 stars
343
$20.95 Chewy Price
$24.99 List Price
Autoship Price

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

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Fluval M 100Watt Submersible Fish Heater slide 1 of 8
Fluval M 100Watt Submersible Fish Heater slide 2 of 8
Fluval M 100Watt Submersible Fish Heater slide 3 of 8
Fluval M 100Watt Submersible Fish Heater slide 4 of 8
Fluval M 100Watt Submersible Fish Heater slide 5 of 8
Fluval M 100Watt Submersible Fish Heater slide 6 of 8
Fluval M 100Watt Submersible Fish Heater slide 7 of 8
Fluval M 100Watt Submersible Fish Heater slide 8 of 8
Fluval M 100Watt Submersible Fish Heater slide 1 of 8
Fluval M 100Watt Submersible Fish Heater slide 2 of 8
Fluval M 100Watt Submersible Fish Heater slide 3 of 8
Fluval M 100Watt Submersible Fish Heater slide 4 of 8
Fluval M 100Watt Submersible Fish Heater slide 5 of 8
Fluval M 100Watt Submersible Fish Heater slide 6 of 8
Fluval M 100Watt Submersible Fish Heater slide 7 of 8
Fluval M 100Watt Submersible Fish Heater slide 8 of 8
Fluval M 100Watt Submersible Fish Heater slide 1 of 8
Fluval M 100Watt Submersible Fish Heater slide 2 of 8
Fluval M 100Watt Submersible Fish Heater slide 3 of 8
Fluval M 100Watt Submersible Fish Heater slide 4 of 8
Fluval M 100Watt Submersible Fish Heater slide 5 of 8
Fluval M 100Watt Submersible Fish Heater slide 6 of 8
Fluval M 100Watt Submersible Fish Heater slide 7 of 8
Fluval M 100Watt Submersible Fish Heater slide 8 of 8

Fluval M 100Watt Submersible Fish Heater

Rated 4.5 out of 5 stars
36
$35.99 Chewy Price
$39.24 List Price
Autoship Price

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

Marina Floating Thermometer with Suction Cup for Aquariums

Rated 4.1 out of 5 stars
271
$2.98 Chewy Price
$5.30 List Price
Autoship Price

Free 1-3 day delivery on first-time orders over $35
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Aquael Platinium Temperature Control Aquarium Heater with Electronic Thermostat, 50W

Rated 4.5 out of 5 stars
25
$30.57 Chewy Price
Autoship Price

Free 1-3 day delivery on first-time orders over $35
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SunGrow Submersible Aquarium Heater with Thermostat for Betta & Turtle Tanks, 10-watt, up to 2-...

Rated 4.2 out of 5 stars
199
$6.91 Chewy Price
$13.99 List Price
Autoship Price

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

Eheim Thermocontrol E Fish Aquarium Heater, 300 W

Rated 4.4 out of 5 stars
48
$59.99 Chewy Price
$82.28 List Price
Autoship Price

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

Underwater Treasures Digital Fish Thermometer

Rated 4 out of 5 stars
41
$2.14 Chewy Price
Autoship Price

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

Penn-Plax Cascade Heat 300W Preset Submersible Aquarium Heater, 12-in

Rated 3.8 out of 5 stars
35
$16.58 Chewy Price
$45.99 List Price
Autoship Price

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

Marineland Precision Heater, 300 Watt

Rated 3.3 out of 5 stars
117
$41.47 Chewy Price
$51.79 List Price
Autoship Price

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

Aqueon Pro Aquarium Heater, 100 watt

Rated 3.8 out of 5 stars
118
$58.75 Chewy Price
$74.95 List Price
Autoship Price

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

Fluval Electronic Aquarium Heater, 300-watt

Rated 4.1 out of 5 stars
109
$75.41 Chewy Price
Autoship Price

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

Lifegard Pre-Set Quartz Glass Heater Electronic Control, 25 watt

Rated 4.3 out of 5 stars
12
$13.59 Chewy Price
$20.51 List Price
Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Sep 5 and Sep 9

Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt

Rated 4.1 out of 5 stars
142
$15.27 Chewy Price
$18.89 List Price
Autoship Price

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

Aquatop Floating Glass Thermometer with Suction Cup Mount

Rated 1 out of 5 stars
1
$3.99 Chewy Price
$8.46 List Price
Autoship Price

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

Marina 6-in Submersible Fish Heater, 50-Watts

Rated 3.2 out of 5 stars
12
$24.99 Chewy Price
$41.59 List Price
Autoship Price

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

Fluval Submersible Glass Aquarium Heater, 50-watt

Rated 4 out of 5 stars
63
$32.99 Chewy Price
$37.22 List Price
Autoship Price

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

Fluval M 150Watt Submersible Fish Heater

Rated 4.3 out of 5 stars
10
$36.99 Chewy Price
$38.03 List Price
Autoship Price

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

Tetrafauna Aquatic Reptile Aquarium Heater, 100-watt

Rated 3.8 out of 5 stars
94
$29.47 Chewy Price
$34.99 List 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, 25 watt

Rated 4.8 out of 5 stars
6
$32.27 Chewy Price
Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Sep 5 and Sep 9

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

Rated 3.2 out of 5 stars
21
$23.97 Chewy Price
$29.99 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 4 out of 5 stars
74
$3.99 Chewy Price
Autoship Price

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

Aquatop Smart-Temp Thermometer with Magnet Mount

Rated 4.3 out of 5 stars
4
$7.99 Chewy Price
Autoship Price

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

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

Rated 4 out of 5 stars
44
$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

Fluval P10 Pre-Set Aquarium Fish Heater

Rated 4.1 out of 5 stars
23
$19.00 Chewy Price
$33.72 List Price
Autoship Price

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

JBJ Aquarium Truetemp Titanium Aquarium Heater, Black, 800-watt

$141.00 Chewy Price
Autoship Price

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

Fluval M 300Watt Submersible Fish Heater

Rated 4.2 out of 5 stars
39
$42.99 Chewy Price
$44.08 List Price
Autoship Price

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

Aqueon Glass Adjustable Aquarium Heater, 50-watt

Rated 3.9 out of 5 stars
95
$37.95 Chewy Price
$46.99 List Price
Autoship Price

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

Fluval Wireless 2-in-1 Digital Fish Thermometer

Rated 4.2 out of 5 stars
29
$17.99 Chewy Price
$30.08 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
73
$12.98 Chewy Price
$22.78 List Price
Autoship Price

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

OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater

Rated 5 out of 5 stars
4
$53.75 Chewy Price
$56.99 List Price
Autoship Price

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

Fluval P25 Pre-Set Aquarium Fish Heater

Rated 4.3 out of 5 stars
12
$25.99 Chewy Price
$32.47 List Price
Autoship Price

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

Aquatop Weighted Glass Thermometer with Claw

Rated 4 out of 5 stars
2
$3.99 Chewy Price
Autoship Price

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

Aquatop Submersible Glass Aquarium Heater, 300-watt

Rated 3.7 out of 5 stars
95
$32.99 Chewy Price
Autoship Price

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

Zoo Med Digital Aquarium Thermometer

Rated 3.5 out of 5 stars
19
$8.99 Chewy Price
$10.99 List Price
Autoship Price

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

Category

Brand

7 Brands are shown below

Product Type

Aquarium Type

Fish Type

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