Turn the temp seeting knob clockwise a little bit till the heater turns on.
Top fin 50 watt aquarium heater instructions.
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.
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.
The issue is that it doesn t specify how to set a particular temperature in the heater.
Choose a submersible aquarium heater that provides 5 watts per gallon.
When you do the heater just started to heat.
If it is set to 28 c the heater will heat the water to 28 c and then will switch off when that temperature is reached.
Ta50h 50w ta100h 100w ta150h 150w ta200h 200w and ta300h 300w 120 volts 60 hz 300149903 feb2017.