I have one clown loach who is about 5 years old and 4.5". When I bought him, he was 1 of 3. Two of them died off rather quickly. So about a year later I got another one to pair him up with , this one died as well. So 4 years later I decided to get him some buddies again, bought 2 loaches about 2" - so far one has died - the other seemed ok for a while and now is thinning and stays under rocks, I'd be surprised if it lives. My old loach is very healthy and plump. I don't understand what I'm doing wrong here. Any one else had this problem? There is also a 6" pleco in the tank. The are plenty of caves and hiding places. The loach I have is my favorite fish I'd really like to have a couple more.