Turn the temp seeting knob clockwise a little bit till the heater turns on.
Top fin 50 watt aquarium heater instructions.
For example a 20 gallon tank would require a 100 watt heater.
Non preset aquarium heaters are less expensive than their preset counterparts often as little as half the price.
This is all the instruction paper says about this matter i quote.
An aquarium heater without an adjustable thermostat also means that the heater cannot be adjusted to account for differences in power stability or for age of the heater and components.
Now before any snotty smarty pants out here tells me to read the instruction paper i have.
Instruction manual submersible aquarium heater the aqueon aquarium submersible heaters are listed by underwriters laboratories to ensure that they meet the stringent u s.
And canadian safety requirements.
Large aquariums lose heat more slowly than small tanks allowing you to buy a heater with as few as 3 watts per gallon.
Look at the front of the filter you should see a little red light come on.
Choose a submersible aquarium heater that provides 5 watts per gallon.
Ta50h 50w ta100h 100w ta150h 150w ta200h 200w and ta300h 300w 120 volts 60 hz 300149903 feb2017.