• Home
  • Aqueon Submersible Aquarium Heater - 300W - Up to 90 gal.

Aqueon Submersible Aquarium Heater - 300W - Up to 90 gal.

2 Reviews
$22.23 $28.99
Item: 236424

In Stock

Available: 1

The Aqueon submersible aquarium heater is renowned for its accuracy, durability and reliability. This easy-to-use aquarium heater is designed from thermal shatter-resistant glass and absorbs impacts. Each Aqueon submersible aquarium heater includes a lifetime warranty. Molded control knobs are easy to grip and read, and each heater has an automatic shutoff when not properly submersed to avoid overheating and damage. Easy indicator light lets you know exactly when it's working.

Comes with 2 suction cups.
Length15 in.
Width0.75 IN. DIAMETER
Temperature Range66 TO 88 DEGREES F.
Power Cord Length6 ft.
Max Wattage300
UL ListedYes

Step 1: Attach suction cups to heater. Attaching both suction cups will ensure proper positioning in your aquarium and will allow adequate water circulation around the heater for even heat distribution. Suction cups should only be placed over label portion of the heater. Note: Do not place suction cups over the heating element portion of the heater.

Step 2: Set heater temperature. In order to set the temperature, turn the adjustent knob to the required temperature value stated on the graduated scale, located on the top of the heater.

Step 3: Install heater in water filled aquarium. The heater works best when installed in the vertical position. The installation of the heater in this position requires that the aquarium must maintain a level above the minimum water level line on the heater. The heater can be installed in the horizontal position. The installation of the heater in this position requires that it be fully submerged at all times.

Step 4: Plug into electrical outlet. Allow for heater to be submerged in water for a minimum of 30 minutes prior to powering the appliance. Once plugged in, the heater will automatically start working. Should your water need heat, the indicator lamp will illuminate showing that the heater is functioning and in heating mode.

Step 5: Allow the heater to run for 24 hours at the original setting prior to adjusting. Check the aquarium water with a reliable thermometer. Should the heater need adjusted, simply turn the adjustment knob to the appropriate setting.

Ratings & Reviews

2 reviews

  • 4 stars
  • 0 reviews
  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

So far so good!


I have been using two of these heaters for two weeks now. In a 75 gal tank one is holding up pretty well.

Works good.


I have had it in the tank for about a week. 300 Watt keeps the temp good in a 90 gallon tank.