This is incorrect for the 37 gallon tank just below the power supply. The first just stopped working. The second struggles to raise the temperature to process the tank. Poor heating, the temperature never matches my two thermometers, one front bottom left, one back top right, and they never match the heating and don't really match, it's probably 150w max. My fish room is also very well heated from the outside , so that the temperature does not have to be raised much. Find another article.
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