Hi there, i currently have 2 Male bettas ( in seperate tanks obviously i'm not sick like the idiots of youtube ) i have noticed that one of them seems to have developed some kind of large growth on it's back at the base of it's tail, now looking at it myself i'm fearing the worst it seems to have sprung up pretty quick out of nowhere, i don't want to have to lose him but if it's going to be causing him pain and discomfort thenit's not fair to leave him suffering, just wondered if anybody had any ideas on what may be causing it, are bettas more suseptible to certain types of growths or anything like that, thanks.