Aquatop GH-100W Submersible Aquarium Heater
Maintain constant and stable temperatures for your aquatic creatures to thrive with AquaTop’s GH-100W aquarium heater. This analog glass heater offers simple and easy installation with the use of the included suction cups and can handle aquariums up to 25 gallons. With the highly visible temperature setting, the GH-100W is easy to set and adjust to the desired temperature with the use of the Temperature Adjustment Knob. This powerful heater also has double insulation and is made from high quality insulated glass. Easy to use temperature setting, adjustable temperature with over-wind protection, suitable for fresh and saltwater use.
Features
- Fully Submersible
- Easy to use temperature setting
- Adjustable temperature with over-wind protection
- Suitable for fresh and saltwater use
- Double insulation
- High quality insulated glass construction
| Specification | Details |
|---|---|
| Heating Power | 100 Watts |
| Water Capacity | Up to 25 gallons |
| Temperature Range | Adjustable (via knob) |
| Material | Insulated glass with double insulation |
| Installation | Includes suction cups |
FAQ
Can this heater be used in both freshwater and saltwater aquariums?
Yes, the AquaTop GH-100W is suitable for both freshwater and saltwater use.
What is the maximum aquarium size this heater can handle?
This heater can handle aquariums up to 25 gallons.
Does the heater have any safety features?
Yes, it includes over-wind protection to prevent overheating.

Edward Slater –
The heater works steadily and keeps my 20-gallon tank at a consistent temperature. The temperature knob is easy to adjust and the glass body is durable. No issues with overheating or leaks after several months of use.
Piers Lyman –
Installed it in my saltwater tank and it’s been reliable. The suction cups hold well and the temperature setting is clear. A bit slow to respond to sudden changes, but overall very stable.
Zoe Underwood –
Great value for the price. Simple to install and the temperature control is accurate. My fish have stayed healthy since I added this heater. No problems with power or temperature fluctuations.