Aqueon Flat Heater
Small Aquatic Flat Heaters are designed for desktops at least 1 gallon in size, but less than 10 gallons. They are completely submersible, easy to install and efficiently warm aquarium water.
- For use with aquariums between 1 to 10 gallons
- 7.5 Watt works best for 1 to 3 gallon fish tanks
- 15 Watt is best for 4 to 10 gallon fish tanks
- Can be used with glass or acrylic enclosures
- Warms aquarium water up to 6°F above ambient room temperature
- Suction cup included for mounting to aquarium
| Specifications |
|---|
| Heater Type: Flat |
| Power Options: 7.5W, 15W |
| Water Temperature Increase: Up to 6°F above ambient |
| Compatible Enclosures: Glass, Acrylic |
| Installation: Submersible with suction cup |
| Recommended Tank Size: 1 to 10 gallons |
FAQ
What is the recommended wattage for a 5-gallon aquarium?
A 15 Watt heater is best for aquariums between 4 and 10 gallons, so it is recommended for a 5-gallon tank.
Can this heater be used in a tank with an acrylic enclosure?
Yes, the heater is compatible with both glass and acrylic enclosures.
How much does the heater increase the water temperature?
It warms the aquarium water up to 6°F above the ambient room temperature.


Emma Kelly –
Installed the 15W model in my 6-gallon tank. It heats up quickly and maintains a steady temperature. The suction cup holds well and the heater is easy to place. No issues so far with overheating or leaks.
Zoe Graham –
Works well for my 3-gallon tank with the 7.5W version. The flat design fits nicely under the glass. It keeps the water warm even on cooler days. Slight delay in warming up when first turned on, but otherwise reliable.
Lisa Gibson –
I used the 15W heater in a 10-gallon tank. It maintains a consistent temperature and doesn’t overheat. The suction cup stays in place even when the tank is moved. Simple to install and effective.