What is an aquarium heater?
An aquarium heater is a device that warms and stabilizes water temperature, essential for tropical and subtropical fish.
Why heaters are important
Most aquarium fish are ectothermic and depend on stable temperatures to:
- Maintain metabolism
- Support immune function
- Reduce stress
Common heater types
- Submersible heaters
- Adjustable heaters
- Inline heaters (used with canister filters)
Choosing the correct wattage depends on tank size and room temperature.