Aquarium Co-Op Heater

Regular price
Sale price
Regular price
Sold out
Unit price

Maximum quantity in stock reached.

  • 1-year 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, hassle-free 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.)

The heater is intended for indoor use only, so please make sure the tank water is around room temperature before plugging it in.

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 559 reviews
Trent K. (Chester, VA, US)
Awesome heater!

Great heater! I love the temp display

heather l. (Marion, VA, US)

easy, reliable, and accurate

Sarah W. (Randolph, ME, US)

We bought a Aquarium Co-op heater a couple months ago, and the heater started to make a clicking sound in the fish tank. So I reached out to customer service to see if there was something I could do to fix it. First off, they answered fairly quickly! Unfortunately it is not a fixable problem, so they offered to give us a refund, replace the heater, or send us a gift card! Nice to have choices. Some places don’t give you an option, they just give you store credit. But we had options, so we chose to have it replaced and they got the new one processed to shop right away. We love Aquarium Co-op products and their service!

Matt (Bloomington, MN, US)
100 Watt Heater

Great little compact heater! Love the size, and it’s very powerful, turns on for a very short time to maintain the tank temp. Saw mixed reviews on the suction cups coming loose but I warmed mine up in hot water before adhering them to the tank and mine have stayed in place :)

Tim W. (Amherst, WI, US)
Works great!

Easy to use, long cord and keeps temperature at what you set it at. I ordered two more.

Liquid error (layout/theme line 881): Could not find asset snippets/jsonld-for-seo.liquid Liquid error (layout/theme line 883): Could not find asset snippets/jsonld-for-seo.liquid