Question by Br14/\/: How many watts for an aquarium heater for a 20G aquatic turtle tank?
Hi there, I am planning on purchasing an aquarium heater for use on my 20G aquatic red eared sliders turtle tank. But I have 2 problems with this. 1 being that I do not know how many watts to use for power, and 2 being that my turtle tank is not filled up all the way to the top. My tank is a bit hard to describe, but if you go Google “Zilla Aquatic Turtle Tank Kit” you will see the tank. The tank seems to have a cut out piece on the side to fit the filter into so the water level is really only 5 and 1/2 inches when filled to touch just below the water outtake of the filter.

My question is, how many watts do you think would be good for a tank like this? Considering the tank is only like halfway full of water, would a 25W be good? I heard on other sites that people suggesting a 50-100W is good for a 20G, but I’m sure their tanks are filled with more water. Hope to get some replies on this because I have my tank near a window in my room and in the morning the water is really…really cold. Turtles are not supposed to live in the cold I’ve heard. The 25W is in my price range too so if a 25W is good for the tank, I am purchasing it as soon as possible.

Thank you to anyone who replies.

Best answer:

Answer by TheRealCP1341
100 Watts is the minimum for a 20g tank. remember your turtles will get very big so you will need a 120 gallon tank in about 6 months. To save money, you can look on craigslist and see if someone has an aquarium heater or accessories and ask for the heater for your price range.

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