I have 5 kuhli loaches in my 55 gallon. There is one prime spot that they all enjoy cuddling in until recently I have noticed that one of them has been forsaken and instead spends all its time in the corner of the tank, just sitting there doing nothing. Does anybody have any reason that this might happen? It is a pretty cramped little hole, but they all seemed to fit. Is it because he has an antisocial disorder? Is it because the other ones are makin babies and he was killin the vibe? Is it because he has bad gas and the others can't stand him? I just want to help that little guy out.