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Fish Tank Heaters & Thermometers Deals

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OASE Indoor Aquatics HeatUp 200 Adjustable Fish Heater slide 1 of 8
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OASE Indoor Aquatics HeatUp 200 Adjustable Fish Heater slide 1 of 8
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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

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Penn-Plax 10W Plastic Safe Aqiuarium Heater, 4-in slide 1 of 5
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Penn-Plax 10W Plastic Safe Aqiuarium Heater, 4-in slide 1 of 5
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Penn-Plax 10W Plastic Safe Aqiuarium Heater, 4-in slide 1 of 5
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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 delivery on first-time orders over $35
Free 365-day returns
Arrives between Sep 3 and Sep 7

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Aqueon Aquatic Flat Heater, 15-watt slide 1 of 7
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Aqueon Aquatic Flat Heater, 15-watt

Rated 3.7 out of 5 stars
56
$17.95 Chewy Price
$20.99 List Price
Autoship Price

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

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Seapora Quartz Aquarium Heater, 200-watt slide 1 of 2
Seapora Quartz Aquarium Heater, 200-watt slide 2 of 2
Seapora Quartz Aquarium Heater, 200-watt slide 1 of 2
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Seapora Quartz Aquarium Heater, 200-watt slide 1 of 2
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Seapora Quartz Aquarium Heater, 200-watt

Rated 4 out of 5 stars
7
$23.99 Chewy Price
Autoship Price

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

OASE Indoor Aquatics Filtosmart Thermo 300 External Fish Heater

Rated 3 out of 5 stars
2
$226.99 Chewy Price
$249.99 List Price
Autoship Price

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

Laguna Power Heat Heated De-Icer, 315W

Rated 4.4 out of 5 stars
25
$84.99 Chewy Price
$112.59 List Price
Autoship Price

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

Seapora SmartTemp Dual Digital Aquarium Heater, 300-watt

Rated 5 out of 5 stars
3
$66.98 Chewy Price
$85.99 List Price
Autoship Price

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

Hydor Theo Shatterproof Aquarium Heater, 150-watt

Rated 3.5 out of 5 stars
45
$30.84 Chewy Price
$41.95 List Price
Autoship Price

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

Pro Clear Aquatic Systems Auto Top Off, 6-g, Red & White, 12 x 8 x 16-in

$136.84 Chewy Price
($22.81/g) Price per Unit
$157.93 List Price
Autoship Price

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

OASE Indoor Aquatics Bioplus Thermo 100 Internal Fish Heater

$70.00 Chewy Price
$99.99 List Price
Autoship Price

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

OASE Indoor Aquatics Bioplus Thermo 200 Internal Fish Heater

Rated 5 out of 5 stars
2
$84.99 Chewy Price
$109.99 List Price
Autoship Price

Free 1-3 day delivery on first-time orders
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 Sep 3 and Sep 7

JBJ Aquarium Arctica Titanium Aquarium Chiller, 1/15-hp

Rated 5 out of 5 stars
3
$643.32 Chewy Price
Autoship Price

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

OASE Indoor Aquatics Biostyle Thermo 30 Fish Heater, White

Rated 1 out of 5 stars
1
$70.99 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
97
$51.49 Chewy Price
$73.19 List Price
Autoship Price

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

Cobalt Aquatics Neo-Glass Submersible Aquarium Heater, 150-watt

Rated 3.5 out of 5 stars
19
$50.34 Chewy Price
$54.95 List Price
Autoship 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
$65.59 Chewy Price
$94.99 List Price
Autoship 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
$15.14 Chewy Price
Autoship Price

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

Fluval M 200Watt Submersible Fish Heater

Rated 4.3 out of 5 stars
29
$39.99 Chewy Price
Autoship Price

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

Laguna Pond Heater, 500W

Rated 3.7 out of 5 stars
7
$84.88 Chewy Price
$196.56 List Price
Autoship Price

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

Pro Clear Aquatic Systems Auto Top Off, 10-g, Red & White, 14.5 x 10 x 16-in

$162.54 Chewy Price
($16.26/g) Price per Unit
$186.68 List Price
Autoship Price

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

K&H Pet Products Thermo-Pond Perfect Climate Submersible Pond Deicer

Rated 3.5 out of 5 stars
21
$33.21 Chewy Price
$86.99 List Price
Autoship Price

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

Out of Stock

Hydor Betta Bowl Slim Fish Tank Heater

Rated 3.3 out of 5 stars
12

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

Out of Stock

Hydor Theo Aquarium Fish Heater, Black, 150-watt

Rated 4.3 out of 5 stars
12

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

Out of Stock

Eheim Jager Thermostat Aquarium Heater, 150- watt

Rated 4.3 out of 5 stars
176

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

Out of Stock

Hydor Micro & Mini Aquarium Slim Heater, 7.5-watt

Rated 3.8 out of 5 stars
36

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

Product Type

Aquarium Type

Fish Type

Brand

7 Brands are shown below

Price

Customer Rating