Okay. So I came home tonight and Wartooth was beyond stressed and I have no idea why. His color faded and his gills were moving rapidly so I changed his water (due to the fact that he has a white spot that will not go away so I have to do regular water changes). His water is at a constant 76 degrees and he hasn't been messed with all day. He's in his emergency tank and has been there since Saturday so that shouldn't be the issue.
Anyways, I covered his tank up with a black shirt of mine, will that smother him? I know that sounds stupid but I'd rather be safe than sorry!