I have a male hongsloi who has been bloated for about 2 months. He has been in a 5 gallon pail. I tried treating him for around 5 weeks with various medicines (both for bacteria infection and parasite) and nothing seemed to work so now i'm just keeping him a 5 gallon pail. For a while he wasn't eating but for the past couple of weeks he has had a very big appetite and comes to the top when he sees me for food (originally he just wanted to be left alone and held to the a spot behind the sponge filter). I've given up on medicines but as long as he is doing ok i figure i should just wait and see what happens. Once a week i give him a fresh pail of water (i swap pails); so he is being kept in clean water - though he poops a lot during the week. He has a mystery snail to keep him company and eat un-eaten food and i put in a bunch of plants schedule for throw out to give him shade (when i prune plants in my 29 i just toss them in his pail). recent (as in a couple of days ago) he seemed to have develop some sort of bubble. At first I thought it might be a parasite but it looks clear like a blister:

