I purchased 3 female bettas from Petco about a month ago. I put one female in a 30 gal community tank and 2 in a 15 gal tank with 4 mystery snails. All was well until about a week and a half ago. I noticed that the 2 in the 15 gal had become lethargic and their fins were clamped also I have an older female betta that had some fin damage so I put the old girl and the 2 in the 15 gal in a 5 gal hospital tank and have treated them with betafix. My old girl seems to be doing well but the 2 younger ones are not recovering at all. They have gotten worse and I'm wondering if anyone can give some advice to what is going on with them. I have posted 2 pics of the girls.