I have had 4 clown loaches for quite some time. For about the last 2 weeks one of them has been very inactive, and occasanally lays on his side. I thought that I would wait to see if it recovers and it hasn't. It looks like it is starving to death. All of the other clowns are absolutley fine, as with the rest of the fish. My ph is a bit high, but it has been for a while and I am now working on slowly lowering it. Ammonia test come out as 0 and nitrates as near 0 and nitrites at 0. I have plants in this tank too, but I just don't know why he isn't healthy. Any suggestions?