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Aquarium Heaters & Thermometers

Aquarium Heaters & ThermometersAquarium fish thrive in stable temperature conditions. Give them exactly that with our brand name heaters that will maintain the tank's temperature 24/7. Shop from our wide range of heaters that suit different sized aquariums.





Digital Aquarium Thermometer
Digital Aquarium Thermometer

($10.99)  $3.69
Tetra HT10 Submersible Heater 50 Watt (2-10 Gal)
Tetra HT10 Submersible Heater 50 Watt (2-10 Gal)

($16.11)  $8.99
Tetra HT30 Submersible Heater 100 Watt (10-30 Gal)
Tetra HT30 Submersible Heater 100 Watt (10-30 Gal)

($19.86)  $12.29
Tetra HT55 Submersible Heater 200 Watt (upto 55 Gal)
Tetra HT55 Submersible Heater 200 Watt (upto 55 Gal)

($43.99)  $17.99
Marineland Stealth Pro Shatter Proof Heater (10 Watt upto 3 gal)
Marineland Stealth Pro Shatter Proof Heater (10 Watt upto 3 gal)

($29.99)  $12.29
Marineland Visi-Therm Submersible Heater (100 Watt upto 29 gal)
Marineland Visi-Therm Submersible Heater (100 Watt upto 29 gal)

($45.99)  $17.89
Marineland Visi-Therm Submersible Heater (300 Watt upto 80 gal)
Marineland Visi-Therm Submersible Heater (300 Watt upto 80 gal)

($61.99)  $21.79
Hydor Theo Aquarium Heater (25 watts)
Hydor Theo Aquarium Heater (25 watts)

($22.99)  $19.99
Elite Submersible Preset Heater (100W)
Elite Submersible Preset Heater (100W)

($19.99)  $14.99
Fluval Edge Compact Aquarium Heater (25 w)
Fluval Edge Compact Aquarium Heater (25 w)

($44.99)  $24.89
Fluval Edge Digital Aquarium Thermometer
Fluval Edge Digital Aquarium Thermometer

($1.81)  $1.39
Fluval M300 Submersible Glass Aquarium Heater (300 watts)
Fluval M300 Submersible Glass Aquarium Heater (300 watts)

($33.79)  $25.99
Fluval M50 Submersible Glass Aquarium Heater (50 watts)
Fluval M50 Submersible Glass Aquarium Heater (50 watts)

($31.19)  $23.99
Marina C10 Submersible Aquarium Heater (10 w)
Marina C10 Submersible Aquarium Heater (10 w)

($24.69)  $18.99
Biorb 12 Volt Transformer
Biorb 12 Volt Transformer

($20.99)  $15.49
Hydor Theo UL Aquarium Heater 50 watts
Hydor Theo UL Aquarium Heater 50 watts

($33.99)  $17.49
Coralife Digital Thermometer
Coralife Digital Thermometer

($8.50)  $6.99
Marineland Green LED Bubble Wand (8 1/2 x 1 1/8)
Marineland Green LED Bubble Wand (8 1/2 x 1 1/8)

($21.96)  $13.99
Stealth Pro Heater (300 Watt)
Stealth Pro Heater (300 Watt)

($38.99)  $32.99
Fluval Advance Electronic Aquarium Heater (300 Watt)
Fluval Advance Electronic Aquarium Heater (300 Watt)

($64.99)  $55.99
Laguna PowerHeat De-Icer
Laguna PowerHeat De-Icer

($94.99)  $79.09
Fluval M100 Submersible Glass Aquarium Heater (100 watts)
Fluval M100 Submersible Glass Aquarium Heater (100 watts)

($31.99)  $23.99
Hydor Theo Aquarium Heater (200 watts)
Hydor Theo Aquarium Heater (200 watts)

($44.99)  $16.29
Biorb Tropical Heater Kit
Biorb Tropical Heater Kit

($51.99)  $39.99
Aqueon Pro Submersible Aquarium Heater (50 Watt)
Aqueon Pro Submersible Aquarium Heater (50 Watt)

($52.99)  $29.99
Aqueon Submersible Aquarium Heaters (300 Watt)
Aqueon Submersible Aquarium Heaters (300 Watt)

($41.99)  $29.99
Digital Aquarium Thermometer is fully submersible. Digital readout faces forward in the tank. Suction cups to the glass
5.00 rating based on 3 reviews
Featured Reviews for Tetra HT10 Submersible Heater 50 Watt (2-10 Gal)
great little heater without the worry by Ralphie's mom04/16/2013

Bought this for my parents' tank. Was able to easily install it, forget about it, and they have an active happy fish tank that I don't have to worry about adjusting the temp!

Awesome heater in small size by Sunshine_86 from Buckner MO11/12/2011

This heater works great, gets to the correct temp and stays there. Does not overheat. Very happy fish!

Warm & Cozy by Greeneyes from Kentucky02/05/2013

My little Dragon no longer has to suffer temperature drops in his watery home. He is so much more active now. The heater goes right to work whenever the water temperature does begin to drop.

Featured Reviews for Tetra HT30 Submersible Heater 100 Watt (10-30 Gal)
best purchase ever by vietnguyen008803/14/2012

this product working is very good. my fish is kind of happy to had a heat on it.

best product ever purchase by koifish from Moreno Valley, California04/04/2013

the heater hold temperature very good. I don't have to adjust or check the temperature any more. My angel fish happy with this.

Good quality at a great price! by Sunshine_86 from Buckner MO01/27/2012

We researched a lot of heaters and found this to be the best value. Bought for my daughters 15 gallon tanks. Keeps the temperature exactly where it needs to be at a great price.

Featured Reviews for Hydor Theo Aquarium Heater (25 watts)
Hydor Theo Aquarium Heater by Donna10/31/2011

This product works well andis well worth the price.

Featured Reviews for Fluval Edge Digital Aquarium Thermometer
by slayer1987 from Dodge City, KS12/09/2012

It works as far as temperature is concerned. Kind of hard to read unless you have light directly on it. Still happy with it.

Don't Bother by MAD from NY NY12/20/2012

I ordered this item, and waited 2 weeks.... They charged my credit card, but never told me that the item was no longer available!!! They are still sending me spam even though I requested to be removed from their mailing list! WTF

Do not order this item by Don't Bother12/05/2012

Entirely Pets does not stock this item. I will not be ordering from Entirely Pets in the future. Not only was this item unavailable, but the other item I ordered was not available either???? Worst of all-they charged my cc & waited 2 weeks to tell me the items were unavailable.

Featured Reviews for Marina C10 Submersible Aquarium Heater (10 w)
Betta owner by Jacob03/16/2011

This got my 1 gallon Betta tank up to 78, just like advertised! its the only small heater on the market that is self-regulating, so I absolutely cannot and would not ever complain! Clint (his name) is a happy fish! While, yes, he does float around it a lot, i think thats generally because its the warmest spot in the tank.

Just the Right Size by Deno05/22/2011

I had been looking for a small heater for my 1.5 gallon tank. This heater works great! Make sure you read all of the instructions prior to placing it. It must become acclimated to the water before you plug it in. I forgot this fact. I thought it had stopped working after cleaning my tank. Luckily I kept the box and instructions.

Featured Reviews for Marineland Green LED Bubble Wand (8 1/2 x 1 1/8)
Awesome by Black dawg from Marinette ,wi11/11/2012

I have three of these bubblers to in a 29 gallon because they didn't make a 16" or longer one that was one color and one in a 10 gallon and I love them



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