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
106
$41.99 Chewy Price
$45.99 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
294
$1.75 Chewy Price
Autoship Price

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

Slide 1 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 1 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 2 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 3 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 4 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 5 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 1 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 2 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 3 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 4 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 5 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 1 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 2 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 3 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 4 of 5
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt slide 5 of 5

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

Rated 4.1 out of 5 stars
140
$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

Eheim Thermocontrol E Fish Aquarium Heater, 300 W

Rated 4.4 out of 5 stars
45
$74.80 Chewy Price
$82.28 List Price
Autoship Price

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

Fluval M 100Watt Submersible Fish Heater

Rated 4.5 out of 5 stars
33
$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

Aqueon Preset Aquarium Heater, 50-watt

Rated 3.6 out of 5 stars
335
$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

SunGrow Submersible Aquarium Heater with Thermostat for Betta & Turtle Tanks, 10-watt, up to 2-...

Rated 4.2 out of 5 stars
190
$13.09 Chewy Price
$13.99 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
269
$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

Fluval Submersible Glass Aquarium Heater, 50-watt

Rated 4 out of 5 stars
62
$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

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

Rated 3.7 out of 5 stars
33
$41.99 Chewy Price
$45.99 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 3.5 out of 5 stars
19
$28.88 Chewy Price
$44.73 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
118
$52.60 Chewy Price
$74.95 List 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
38
$38.99 Chewy Price
$39.99 List Price
Autoship Price

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

Marineland Precision Heater, 300 Watt

Rated 3.3 out of 5 stars
115
$41.47 Chewy Price
$51.79 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 3.3 out of 5 stars
20
$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

Underwater Treasures Digital Fish Thermometer

Rated 4 out of 5 stars
38
$2.14 Chewy Price
Autoship Price

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

OASE Indoor Aquatics HeatUp 25 Adjustable Fish Heater

Rated 3.8 out of 5 stars
12
$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

Marina 6-in Submersible Fish Heater, 50-Watts

Rated 3.2 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
$64.99 Chewy 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
106
$52.92 Chewy Price
$54.99 List Price
Autoship Price

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

Aquael Platinium 300W Glass Heater

Rated 4.6 out of 5 stars
23
$37.05 Chewy Price
Autoship Price

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

Aqueon Glass Adjustable Aquarium Heater, 50-watt

Rated 3.8 out of 5 stars
94
$37.95 Chewy Price
$46.99 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
10
$36.35 Chewy Price
Autoship Price

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

Hydor Betta & Betta Bowl Slim Heater, 7.5-watt

Rated 3.8 out of 5 stars
41
$14.49 Chewy Price
Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between May 31 and Jun 4

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

Seapora SmartTemp Dual Digital Aquarium Heater, 100-watt

Rated 5 out of 5 stars
3
$55.78 Chewy Price
$71.99 List Price
Autoship Price

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

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

Rated 3.9 out of 5 stars
70
$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, 25 watt

Rated 5 out of 5 stars
5
$29.07 Chewy Price
$32.27 List Price
Autoship Price

Free delivery on first-time orders over $35
Free 365-day returns
Arrives between Jun 3 and Jun 7

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

Rated 4 out of 5 stars
91
$3.99 Chewy Price
$4.99 List 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
$61.06 Chewy Price
$64.99 List Price
Autoship Price

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

Underwater Treasures Seapora Volt-Control Titanium Grounding Probe

Rated 5 out of 5 stars
1
$12.99 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 4.3 out of 5 stars
12
$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

Fluval Wireless 2-in-1 Digital Fish Thermometer

Rated 4.1 out of 5 stars
28
$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

OASE Indoor Aquatics HeatUp 400 Adjustable Fish Heater

Rated 4.7 out of 5 stars
3
$57.99 Chewy Price
$62.99 List Price
Autoship Price

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

Seapora Digital Thermometer with Probe

Rated 3.8 out of 5 stars
13
$12.85 Chewy Price
$16.99 List Price
Autoship Price

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

Lifegard Digital Thermometer & Hygrometer, Black

Rated 3.2 out of 5 stars
5
$54.99 Chewy Price
$57.73 List Price
Autoship Price

Free delivery on first-time orders
Free 365-day returns
Arrives between Jun 4 and Jun 9

Category

Thermometers

Tank Heaters

Save 5% on repeat deliveries

Product Type

Aquarium Type

Brand

7 Brands are shown below

Fish Type

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