There are different sizes of heaters for different sized aquariums.
Adjustable heater for small fish tank.
Unlike the preset heater an adjustable heater can automatically regulate the temperature thanks to a thermostat.
25watt is appropriate for small aquariums.
It can be easily fit in the small fish tank.
The hydor theo is an adjustable aquarium heater.
The device shuts off automatically after reaching this level.
Hydor submersible glass aquarium heater is not difficult to use.
The wire of the heater is long enough.
Hygger mini submersible aquarium heater 50w 100w adjustable led digital temperature display small tank heater for turtle betta fish water heater with protective guard 4 0 out of 5 stars 509 19 99 19.
The adjustable heater helps to prevent the risk of overheating.
Most importantly it s the smallest adjustable heater on the market.
Hygger mini submersible aquarium heater 50w 100w adjustable led digital temperature display small tank heater for turtle betta fish water heater with protective guard 4 0 out of 5 stars 500 19 99 19.
And it will turn on when water tends to cool down.
All you have to do is set a temperature between 67 91 f.