I know I cleaned everything up. The reason I wanted to clean it out was because I just want to redo the tank and get different substrate. They're looking a little better, but the smaller bp was lying on his side for about 20 minutes before I moved them. Not usually a good sign, but he does look better now, so we'll see.
I will never buy a floating thermometer again.
I will never buy a floating thermometer again.

They were looking so much better, but they suddenly went white again last night and died. Water was fine. Ammonia 0, Nitrite 0, nitrate about 10, ph 7.2, 79 degrees. So, I think it was related to whatever happened to them with the thermometer. I haven't lost a fish in a long time.