Aquarium Co-Op Heater

Regular price
Sale price
Regular price
Sold out
Unit price

Maximum quantity in stock reached.

Maximum quantity in stock reached.

Save $4.99.

  • 1-year, hassle-free Aquarium Co-Op warranty
  • Built-in heater guard 
  • Extra-long, 11.8-foot cord

The Aquarium Co-Op heater comes in two sizes — 50 watt and 100 watt. It is reliable, accurate, and thoughtfully designed to avoid some of the problems we encounter with many other heater brands on the market. If you do run into a problem, Aquarium Co-Op provides a 1-year warranty on this heater.

This compact heater is easy to position within the aquarium and has a built-in heater guard to protect the unit from damage. You can quickly adjust the temperature without getting your hands wet, since the adjustable temperature controller is located in the middle of the power cord and sits outside the aquarium. Plus, the cord itself is extra long and extends 11.8 feet, so reaching the outlet is much easier compared to many other heaters. (The cord length between the heater and controller is 4 feet.)

Note: When you first plug in the heater, a yellow indicator light will briefly turn on and then turn off again. The yellow light will turn on again once the unit has run for 17,520 hours, which is 2 years of being plugged in full time. At this point, the heater will still continue to work, but the yellow light reminds you that it has reached the end of its expected life and it may be time to start thinking about replacing the unit to ensure the highest performance. The red indicator light turns on whenever the heater is actively heating the water, and the temperature display is always on to show the current water temperature.

Download the Manual

Customer Reviews

Based on 407 reviews
Gunnar (Timnath, CO, US)
The only heater I will buy from now on

I was using a different nano heater for my 7.5 gallon that should've shut off after reaching temp but never did and after getting this 50watt heater I hardly see it on. Reaches temp quickly and love the temp display.

I also bought two 100 watt heaters for my 75 gallon and replaced the 300watt heater for two of the 100 watt heater and they hold temp better that my 300 watt!

Ashlie R. (Littleton, CO, US)
Best heater on the market

I absolutely love these heaters. Genius design! My favorite part about this product is the temperature dial. Conveniently adjust it without getting your hands wet! Digital display is lovely as well as the extra long cord.

Emmanuel R. (Charlotte, NC, US)

Very practical and easy to use.

Tracey B. (Davenport, IA, US)
Love it!!!

I can’t wait to buy one for each of my tanks!! I have the smaller one in with my gourami fry right now and I feel like I don’t have to worry bout it!!! Peace of mind!!! Yay!! I love the long cord a being able to adjust it outside the water!!!

Anthony K. (Little Rock, AR, US)
Great heater

Absolutely love this heater, works great in my 55g gonna get more for my other tanks