Freshwater Aquarium Heaters & Thermometers

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Slide 1 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 1 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 2 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 3 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 4 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 5 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 1 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 2 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 3 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 4 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 5 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 1 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 2 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 3 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 4 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 5 of 5
Slide 1 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 1 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 2 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 3 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 4 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 5 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 1 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 2 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 3 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 4 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 5 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 1 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 2 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 3 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 4 of 5
Tetra HT40 Submersible Aquarium Heater & Electronic Thermostat, 150-watt slide 5 of 5

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

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

Slide 1 of 2
Fluval M 150Watt Submersible Fish Heater slide 1 of 2
Fluval M 150Watt Submersible Fish Heater slide 2 of 2
Fluval M 150Watt Submersible Fish Heater slide 1 of 2
Fluval M 150Watt Submersible Fish Heater slide 2 of 2
Fluval M 150Watt Submersible Fish Heater slide 1 of 2
Fluval M 150Watt Submersible Fish Heater slide 2 of 2
Slide 1 of 2
Fluval M 150Watt Submersible Fish Heater slide 1 of 2
Fluval M 150Watt Submersible Fish Heater slide 2 of 2
Fluval M 150Watt Submersible Fish Heater slide 1 of 2
Fluval M 150Watt Submersible Fish Heater slide 2 of 2
Fluval M 150Watt Submersible Fish Heater slide 1 of 2
Fluval M 150Watt Submersible Fish Heater slide 2 of 2

Fluval M 150Watt Submersible Fish Heater

Rated 4.1 out of 5 stars
7
$34.99 Chewy Price
$35.99 List Price

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

Slide 1 of 2
Seapora Quartz Aquarium Heater, 100-watt slide 1 of 2
Seapora Quartz Aquarium Heater, 100-watt slide 2 of 2
Seapora Quartz Aquarium Heater, 100-watt slide 1 of 2
Seapora Quartz Aquarium Heater, 100-watt slide 2 of 2
Seapora Quartz Aquarium Heater, 100-watt slide 1 of 2
Seapora Quartz Aquarium Heater, 100-watt slide 2 of 2

Seapora Quartz Aquarium Heater, 100-watt

Rated 4 out of 5 stars
5
$21.99 Chewy Price

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

Slide 1 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 1 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 2 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 3 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 4 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 5 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 6 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 7 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 1 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 2 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 3 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 4 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 5 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 6 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 7 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 1 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 2 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 3 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 4 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 5 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 6 of 7
OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater slide 7 of 7

OASE Indoor Aquatics HeatUp 300 Adjustable Fish Heater

Rated 5 out of 5 stars
2
$41.59 Chewy Price
$56.99 List 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
$25.99 Chewy Price

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

Fluval P25 Pre-Set Aquarium Fish Heater

Rated 3.8 out of 5 stars
5
$22.99 Chewy Price
$29.99 List Price

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

Lifegard Led Digital Thermometer, Blue

Rated 4.3 out of 5 stars
4
$34.49 Chewy Price

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

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

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

OASE Indoor Aquatics HeatUp 150 Adjustable Fish Heater

Rated 5 out of 5 stars
1
$42.99 Chewy Price
$44.99 List Price

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

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

$13.95 Chewy Price
$39.99 List Price

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

Hydor Theo Shatterproof Aquarium Heater, 25-watt

Rated 3.5 out of 5 stars
42
$26.89 Chewy Price
$35.95 List Price

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

Seapora Mini Desktop Aquarium Heater, 30-watt

Rated 2 out of 5 stars
1
$13.99 Chewy 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 4.5 out of 5 stars
2
$32.89 Chewy Price
$48.99 List Price

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

JBJ Aquarium Arctica Titanium Auqarium Chiller, 1/4-hp

Rated 5 out of 5 stars
2
$965.22 Chewy Price

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

Hydor Betta & Betta Bowl Slim Heater, 7.5-watt

Rated 3.9 out of 5 stars
39
$17.06 Chewy Price

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

OASE Indoor Aquatics Biomaster Thermo 600 External Fish Heater

Rated 5 out of 5 stars
2
$394.97 Chewy Price
$400.99 List Price

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

Lifegard Digital Thermometer & Hygrometer, Black

Rated 3.2 out of 5 stars
5
$49.88 Chewy Price
$57.73 List Price

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

OASE Indoor Aquatics Digital Fish Thermometer

Rated 3.7 out of 5 stars
3
$19.99 Chewy 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

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

Zoo Med BettaTherm Mini Size Betta Bowl Heater

Rated 2.3 out of 5 stars
11
$21.43 Chewy 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 4.8 out of 5 stars
4
$37.14 Chewy Price
$37.99 List Price

Free 1-3 day delivery on first-time orders
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

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

Fluval Sea Aquarium Hydrometer, Medium

Rated 2.5 out of 5 stars
6
$9.09 Chewy Price
$14.99 List 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
$59.99 Chewy Price
$62.99 List Price

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

OASE Indoor Aquatics Filtosmart Thermo 300 External Fish Heater

$226.99 Chewy Price
$249.99 List Price

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

OASE Indoor Aquatics Bioplus Thermo 100 Internal Fish Heater

$84.99 Chewy Price
$99.99 List Price

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

OASE Indoor Aquatics Bioplus Thermo 50 Internal Fish Heater

Rated 3 out of 5 stars
2
$89.99 Chewy Price
$94.99 List Price

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

OASE Indoor Aquatics Biostyle Thermo 30 Fish Heater, Dark Blue

Rated 1 out of 5 stars
1
$88.99 Chewy Price

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

OASE Indoor Aquatics Filtosmart Thermo 200 External Fish Heater

Rated 5 out of 5 stars
1
$181.97 Chewy Price
$219.99 List Price

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

OASE Indoor Aquatics Filtosmart Thermo 100 External Fish Heater

Rated 4 out of 5 stars
2
$134.99 Chewy Price
$169.99 List Price

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

OASE Indoor Aquatics Biostyle Thermo 30 Fish Heater, White

Rated 1 out of 5 stars
1
$71.00 Chewy Price
$76.05 List Price

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

OASE Indoor Aquatics Biostyle Thermo 50 Fish Heater, Dark Blue

Rated 5 out of 5 stars
1
$98.99 Chewy Price

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

OASE Indoor Aquatics Biostyle Thermo 50 Fish Heater, White

$98.99 Chewy Price

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

Out of Stock

Penn-Plax Aquarium LED Display Heater, 300W

Rated 2.4 out of 5 stars
5

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

Out of Stock

Eheim Jager Thermostat Aquarium Heater, 200-watt

Rated 4.3 out of 5 stars
173

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

Out of Stock

Aquatop Floating Glass Thermometer with Suction Cup Mount

Rated 1 out of 5 stars
1

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

Category

Aquarium & Fish Tank Heaters

Aquarium & Fish Tank Thermometers

Product Type

Aquarium Type

Brand

7 Brands are shown below

Fish Type

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