10 Best Aquarium Heaters 2026: According to Reviews | Chewy

The 10 Best Aquarium Heaters

Jump to the list

How we created this aquarium heater list

We leveraged input from our veterinarians and artificial intelligence to identify key considerations to help you find the best aquarium heater.
We scanned thousands of customer reviews and ratings and scored each product based on its performance against each of the key considerations. We then considered how popular a product is with Chewy customers and combined that with its key consideration scores to create the list of the best aquarium heaters.

Key aquarium heater considerations

Durability and Safety Features

Ease of Use and Installation

Heating Capacity

Temperature Accuracy

1
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt
LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt

LvLrister Titanium Thermostat with Intelligent LED Display Submersible Aquarium Heater, 12.8-in, 300-watt

Rated 4.5 out of 5 stars
114
$23.99 Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Durability and Safety Features

4.4/5
Great

Ease of Use and Installation

4.5/5
Great

Heating Capacity

4.7/5
Excellent

Temperature Accuracy

4.6/5
Excellent

Is this aquarium heater right for my pet?

Material

Plastic

Aquarium Type

Saltwater

Capacity (Max)

≥120-250-L

Fish Type

Tropical Freshwater
2
Fluval Electronic Aquarium Heater, 300-watt
Fluval Electronic Aquarium Heater, 300-watt
Fluval Electronic Aquarium Heater, 300-watt
Fluval Electronic Aquarium Heater, 300-watt
Fluval Electronic Aquarium Heater, 300-watt
Fluval Electronic Aquarium Heater, 300-watt
Fluval Electronic Aquarium Heater, 300-watt
Fluval Electronic Aquarium Heater, 300-watt
Fluval Electronic Aquarium Heater, 300-watt

Fluval Electronic Aquarium Heater, 300-watt

Rated 4 out of 5 stars
102
$53.92 Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Durability and Safety Features

4.6/5
Excellent

Ease of Use and Installation

4.7/5
Excellent

Heating Capacity

4.6/5
Excellent

Temperature Accuracy

4.7/5
Excellent

Is this aquarium heater right for my pet?

Material

Plastic

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater, Marine Fish
3
Underwater Treasures Floating Glass Fish Thermometer

Underwater Treasures Floating Glass Fish Thermometer

Rated 4.4 out of 5 stars
258
$1.75 Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Durability and Safety Features

4.1/5
Great

Ease of Use and Installation

4.2/5
Great

Heating Capacity

4.2/5
Great

Temperature Accuracy

4.0/5
Great

Is this aquarium heater right for my pet?

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater, Marine Invertebrate, Betta, Bottom Feeder...
4
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt
Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt

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

Rated 4.1 out of 5 stars
130
$15.27 Chewy Price
Promo, Spend $100, Get $30 eGift Card with code HAVEFUN

Our ratings

Durability and Safety Features

4.5/5
Great

Ease of Use and Installation

4.4/5
Great

Heating Capacity

4.3/5
Great

Temperature Accuracy

4.3/5
Great

Is this aquarium heater right for my pet?

Material

Plastic

Aquarium Type

Nano Tank, Freshwater, Saltwater
5
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal
SunGrow Betta & Turtle Submersible Aquarium Tank Water Heater with Thermostat, 10-watt, up to 5-gal

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

Rated 4.2 out of 5 stars
181
$6.41 Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Durability and Safety Features

3.8/5
Good

Ease of Use and Installation

3.7/5
Good

Heating Capacity

4.0/5
Great

Temperature Accuracy

4.3/5
Great

Is this aquarium heater right for my pet?

Material

Plastic

Aquarium Type

Nano Tank, Freshwater

Fish Type

Betta, Tropical Freshwater, Goldfish, Cichlid
6
Marina Floating Thermometer with Suction Cup for Aquariums

Marina Floating Thermometer with Suction Cup for Aquariums

Rated 4.1 out of 5 stars
259
$3.99 Chewy Price
Promo, Spend $100, Get $30 eGift Card with code HAVEFUN

Our ratings

Durability and Safety Features

4.2/5
Great

Ease of Use and Installation

3.7/5
Good

Heating Capacity

4.1/5
Great

Temperature Accuracy

4.2/5
Great

Is this aquarium heater right for my pet?

Material

Plastic

Aquarium Type

Freshwater, Saltwater

Fish Type

Tropical Freshwater, Marine Fish
7
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt
Penn-Plax Cascade Heat Preset Submersible Aquarium Heater, 10-in, 150-watt

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

Rated 4.2 out of 5 stars
99
$13.90 Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Durability and Safety Features

3.4/5

Ease of Use and Installation

3.7/5
Good

Heating Capacity

3.9/5
Good

Temperature Accuracy

3.9/5
Good

Is this aquarium heater right for my pet?

Material

Plastic

Aquarium Type

Freshwater

Fish Type

Tropical Freshwater
8
Aquael Platinium 150W Glass Heater
Aquael Platinium 150W Glass Heater
Aquael Platinium 150W Glass Heater
Aquael Platinium 150W Glass Heater
Aquael Platinium 150W Glass Heater
Aquael Platinium 150W Glass Heater

Aquael Platinium 150W Glass Heater

Rated 4.7 out of 5 stars
20
$33.78 Chewy Price
Promo, Spend $100, Get $30 eGift Card with code HAVEFUN

Our ratings

Durability and Safety Features

4.7/5
Excellent

Ease of Use and Installation

4.8/5
Excellent

Heating Capacity

4.6/5
Excellent

Temperature Accuracy

4.7/5
Excellent

Is this aquarium heater right for my pet?

Aquarium Type

Saltwater, Freshwater, Brackish

Fish Type

Tropical Freshwater
9
Hydor Micro & Mini Aquarium Slim Fish Heater, Black, 15-watt
Hydor Micro & Mini Aquarium Slim Fish Heater, Black, 15-watt
Hydor Micro & Mini Aquarium Slim Fish Heater, Black, 15-watt
Hydor Micro & Mini Aquarium Slim Fish Heater, Black, 15-watt

Hydor Micro & Mini Aquarium Slim Fish Heater, Black, 15-watt

Rated 4.4 out of 5 stars
10
$15.29 Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Durability and Safety Features

4.7/5
Excellent

Ease of Use and Installation

4.5/5
Great

Heating Capacity

4.8/5
Excellent

Temperature Accuracy

4.7/5
Excellent

Is this aquarium heater right for my pet?

Material

Plastic

Aquarium Type

Nano Tank

Fish Type

Marine Fish
10
Laguna Power Heat Heated De-Icer, 315W
Laguna Power Heat Heated De-Icer, 315W
Laguna Power Heat Heated De-Icer, 315W
Laguna Power Heat Heated De-Icer, 315W
Laguna Power Heat Heated De-Icer, 315W

Laguna Power Heat Heated De-Icer, 315W

Rated 4.3 out of 5 stars
23
$66.29 Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Durability and Safety Features

4.5/5
Great

Ease of Use and Installation

4.2/5
Great

Heating Capacity

4.4/5
Great

Temperature Accuracy

4.5/5
Great

Is this aquarium heater right for my pet?

Material

Plastic

Fish Type

Koi & Pond Fish