Freshwater Aquarium Heaters & Thermometers

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SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 1 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 2 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 3 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 4 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 5 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 6 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 1 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 2 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 3 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 4 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 5 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 6 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 1 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 2 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 3 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 4 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 5 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 6 of 6
Slide 1 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 1 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 2 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 3 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 4 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 5 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 6 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 1 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 2 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 3 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 4 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 5 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 6 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 1 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 2 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 3 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 4 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 5 of 6
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal slide 6 of 6

SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5...

Rated 4.2 out of 5 stars
187
$10.91 Chewy Price
$13.99 List Price
Autoship Price

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

Slide 1 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 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
Slide 1 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 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
104
$13.90 Chewy Price
$45.99 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 4.3 out of 5 stars
39
$50.69 Chewy Price
$82.28 List Price
Autoship Price

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

Underwater Treasures Floating Glass Fish Thermometer

Rated 4.4 out of 5 stars
274
$1.75 Chewy Price
Autoship Price

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

Aqueon Preset Aquarium Heater, 100-watt

Rated 3.6 out of 5 stars
333
$20.82 Chewy Price
$32.99 List Price
Autoship Price

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

Tetrafauna Aquatic Reptile Aquarium Heater, 100-watt

Rated 3.8 out of 5 stars
87
$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

Fluval M 100Watt Submersible Fish Heater

Rated 4.5 out of 5 stars
31
$32.99 Chewy Price
$35.99 List Price
Autoship Price

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

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

Rated 4.1 out of 5 stars
134
$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

Aquael Platinium 300W Glass Heater

Rated 4.7 out of 5 stars
21
$34.99 Chewy Price
$37.05 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
59
$30.99 Chewy Price
$34.99 List Price
Autoship Price

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

Marina Floating Thermometer with Suction Cup for Aquariums

Rated 4.1 out of 5 stars
263
$3.99 Chewy Price
$4.48 List 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 3.6 out of 5 stars
30
$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

Aqueon Glass Adjustable Aquarium Heater, 50-watt

Rated 3.8 out of 5 stars
93
$37.95 Chewy Price
$46.99 List Price
Autoship Price

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

OASE Indoor Aquatics HeatUp 25 Adjustable Fish Heater

Rated 3.7 out of 5 stars
11
$19.95 Chewy Price
$35.99 List Price
Autoship Price

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

SunGrow Betta Fish Thermometer Sticker, Temperature Strip for Small Aquarium & Reptiles Tank

Rated 4 out of 5 stars
90
$4.99 Chewy Price
Autoship Price

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

Fluval E200 Electronic Fish Aquarium Heater, 200-watt

Rated 3.7 out of 5 stars
3
$60.11 Chewy Price
$64.99 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
104
$53.98 Chewy Price
$54.99 List Price
Autoship Price

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

Cobalt Aquatics Neo-Glass Submersible Aquarium Heater, 100-watt

Rated 3.6 out of 5 stars
18
$29.67 Chewy Price
$44.73 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 3.2 out of 5 stars
113
$41.47 Chewy Price
$51.79 List Price
Autoship Price

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

Marina 6-in Submersible Fish Heater, 50-Watts

Rated 3 out of 5 stars
11
$14.64 Chewy Price
$32.99 List Price
Autoship Price

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

H2Pro Titanium Aquarium Heater, 200-watt

Rated 4.3 out of 5 stars
11
$64.87 Chewy Price
$64.99 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 4.1 out of 5 stars
27
$21.99 Chewy Price
$25.99 List Price
Autoship Price

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

Aqueon Pro Aquarium Heater, 100 watt

Rated 3.8 out of 5 stars
117
$52.06 Chewy Price
$74.95 List Price
Autoship Price

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

Seapora SmartTemp Dual Digital Aquarium Heater, 100-watt

Rated 5 out of 5 stars
3
$55.77 Chewy Price
$71.99 List Price
Autoship Price

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

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

Rated 3.2 out of 5 stars
19
$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

OASE Indoor Aquatics HeatUp 50 Adjustable Fish Heater

Rated 4.2 out of 5 stars
5
$33.81 Chewy Price
$37.99 List Price
Autoship Price

Free 1-3 day delivery on first-time orders over $35
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 Apr 13 and Apr 17

Fluval M 300Watt Submersible Fish Heater

Rated 4.2 out of 5 stars
34
$38.99 Chewy Price
$39.99 List Price
Autoship Price

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

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

Rated 1 out of 5 stars
1
$8.61 Chewy Price
$39.99 List Price
Autoship Price

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

Underwater Treasures Easy Read Fish Thermometer

Rated 2.8 out of 5 stars
13
$10.69 Chewy Price
Autoship Price

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

Fluval P25 Pre-Set Aquarium Fish Heater

Rated 4.2 out of 5 stars
9
$22.99 Chewy Price
$29.99 List Price
Autoship Price

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

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

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

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

Category

Thermometers

Tank Heaters

Product Type

Aquarium Type

Brand

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Fish Type

Price

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