fasting

He is on day two of fasting now since I noticed he was bloated. He's been sitting in the bottom corner of the tank. I've checked on him to make sure he's still alive, he doesn't seem to have any problems swimming, it just seems like it's more comfortable for him to stay there as he swims back...

So I ususally fast my betta fish about 2 days out of the week, every week. I was wondering if fasting my other fish (koi,goldies,corys,platys, tiger barb) would be alright as well? I know that platies poop A LOT, however i noticed that one of my platies had a really thick poop (sorry if that is...