Aqueon Pro Aquarium Heater

By Aqueon
Rated 3.5625 out of 5 stars


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$64.99Chewy Price
$69.99Chewy Price

Spend $100, Get $30 eGift Card with code: FALL

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This Item – Aqueon Pro Aquarium Heater, 300 watt
Rated 3.5625 out of 5 stars
$64.99Chewy Price

Spend $100, Get $30 eGift Card with code: FALL

Marineland Bio-Wheel Emperor 400 Aquarium Power Filter, 80-gal
Rated 4.2324 out of 5 stars
$78.34Chewy Price

Spend $100, Get $30 eGift Card with code: FALL

Total Price: $143.33

About This Item


  • Perfect for easily maintaining the ideal water temperature for both healthy salt and freshwater community fish tanks.
  • Available in a wide range of the most common wattage sizes to provide a custom heating experience for any aquarium.
  • Precise temperature dial from 68 to 88 °F allows for complete control of aquatic climate within a 1-degree difference.
  • Durable shatter-resistant heater construction allows for completely submersible and safe aquarium temperature control.
  • LED indicator lights up red when heating or green when not heating, and auto shut-off feature prevents overheating.

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Learn More About Aqueon From Our Team of Experts

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Fish TypeMarine Fish, Tropical FreshwaterMarine Fish, Tropical FreshwaterMarine Fish, Tropical FreshwaterMarine Fish, Tropical FreshwaterBetta, Cichlid, Goldfish, Marine Fish, Tropical Freshwater
Aquarium TypeSaltwater, FreshwaterSaltwater, FreshwaterFreshwaterSaltwater, FreshwaterSaltwater, Freshwater
MaterialPlasticPlastic, PolypropylenePlasticPlastic

Questions & Answers

17 Customer Questions

How many watts will i need for a 75 gallon tank?
Answer by ChewyMar 26, 2019
The wattage needed will depend on how many degrees you need to increase above room temperature (68-72 degrees fahrenheit). For increasing a 75 gallon aquarium 5-10 degrees fahrenheit, choose the 200 watt heater. If increasing the 75 gallon aquarium by 15 degrees fahrenheit, choose the 300 watt heater. Please see the image attached for the Heater Guidelines.

Is this heater good for red eared sliders? Also up to what degree does heater go up to cuz I'm looking for heater that can go up to 88-92 degrees. Also what does the 3rd bullet point mean when it says "complete control of aquatic climate within a 1-degree difference"?
Answer by ChewyJan 22, 2020
This Pro Heater wouldn't be suitable for a red eared slider turtle as they need a temperature gradient (95°F for the warm end/basking area and 75°F for the cool end/water). This heater has a precise temperature dial from 68-88°F and allows for complete control of aquatic climate within a 1-degree difference. This 1-degree difference is added for safety and precision.

how long is the 300watt and can you put it horizontal
Answer by ChewyMar 28, 2019
This heater can be placed vertically or horizontally. The 300 watt heater is 3.5 x 1.5 x 15.25 inches.

Can this go in a 3.5g plastic tank?
Answer by ChewyNov 07, 2019
This heater may be used in a glass or acrylic (plastic) tank.

ReviewsWrite a Review

Rated 3.5625 out of 5 stars
80 Ratings
Would recommend to a friend

80 Customer Reviews

Rated 1 out of 5 stars
By Vika7 on May 6, 2023

Defective heater

When I went to bed my Bettas tank was 80 degrees. When I woke up the next morning his tank was 75 degrees. The red indicator light was on but it wasn't heated up. I have the older version of this heater and it hasn't failed me in 2 years. This new "Pro" didn't make it 24 hours. This is why you should always keep a thermostat in your fish tank because heaters fail all the time. My poor Betta had a 5 degree temperature drop in a short period of time so I hope he doesn't get sick. Chewy has great customer service and refunded my payment so I can put it towards another heater. Thank you Chewy for standing by your products!

Rated 1 out of 5 stars
By RFWQuasar on May 13, 2022

It Exploded!

As is my habit, I placed the heater in a 5 gallon bucket to test it before adding to my tank. It was fully submerged and vertical. I waited a full hour before plugging it in, as per the instructions. Two hours later, it quite literally exploded, sending out mangled pieces of plastic around the room. The force of the explosion was enough for the water to reach the ceiling.

Rated 2 out of 5 stars
By Mac on Jul 12, 2022

Do not purchase

No matter how i set the thermostat the water temp stays at 74’

Rated 4 out of 5 stars
By Beck on Dec 21, 2021

Better than the Tetra brand!

After having issues with 3 Tetra pre set heaters I decided to buy 2 of these. None of the Tetra heaters reached a temperature of 75°. The Aqueon brand I bought a 50 and the 100. The 50 worked fine when set at 76° it reached the proper temperature. The 100 when set at 76° did not. In order to reach that temperature it needed to be set higher. No problem though because it can be adjusted. I will never purchase a pre set heater again.

Rated 5 out of 5 stars
By Bentley on Feb 28, 2022

Works great

Bought the 150 watt Aqueon heater for my 36gal tank and got it to temp fairly quick and so far no problems the 3 weeks it's been in there.

Rated 1 out of 5 stars
By dough on Nov 27, 2021


I purchased this for a 20g aquarium but found not only the dial to set the temperature was inaccurate but after a few months I had to keep bumping the temperature setting up to maintain the correct temperature. To have water at 78 deg, I had to set the heater at 81. After a few months, I had to change it to 82deg to maintain. Then eventually, 84. I didn't trust it anymore and figured it would over heat the water.

Rated 5 out of 5 stars
By Bill on Dec 17, 2021

Reliable, Dependable, Affordable

I have found the Aqueon submersible and Pro heaters to be accurate and dependable. I've used other brands and at some point had problems. I have a 50W, 100W and 150W and never a problem in 2 years.

Rated 1 out of 5 stars
By Nope on Feb 21, 2022

Don’t buy this product

This heater broke within 2 weeks. Very disappointed. Our frogs are stuck in cold water now.

Rated 5 out of 5 stars
By Geri63 on May 27, 2021

Great Aquarium Heater

I bought this plastic heater because I recently lost over 12 fish in my big show tank filled with my beautiful male Cichlid breeders! I had a glass heater in this tank and some of the males must have been chasing each other and they broke the glass on the heater. I lost the 12 fish due to them being electrified! I’ll never ever use a glass heater again!!! This wonderful heater works perfectly and I never have to worry about electrocution again!!! Thanks Aqueon!!!

Rated 5 out of 5 stars
By Nene on Jul 26, 2021

Working well!

So far the heater is keeping temps steady. Plus I like the total black color as it makes the heater disappear against the tank background.