Don't worry, the so-called heater doesn't work, this second heater didn't work either. There are currently 9 aquariums installed, I know a lot about heaters. I was trying to use this heater in a hospital aquarium that currently has 2 residents. WHERE the water should be 81, it's now below room temperature 72. These guys are already in trouble and don't need useless heating that refuses to work.
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