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Aquarium Heater Wattage Calculator

This handy tool will help you more accurately determine the heater you should use for your aquarium. The default setting for difference between ambient temperature and tank temperature is 10° F. This tool is a little more accurate than the 5 watts per gallon rule because it accounts for ambient room temperature and tank size. For larger tanks you may want to consider using multiple heaters to acheive the desired total wattage.



Aquarium Heater

Please input the following measurments in US gallons for the tank


Aquarium Gallons
Biggest daily difference between tank temperature and ambient room temperature

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