well my pleco is about 6-7 inches and had him for about a year now. i have four 2-3 inch oscars and two 5-6 inch red-tail tinfoil barbs living with him in a 29 gallon tank. he barely moves at all now as he moves lifelessly at the botttom. i haven't seen him on the glass lately, so i put his cucumber next to him and he laid on it but wasn't suckiing on it, it seems he hasn't eaten in two weeks, and his fins are wearing away. i was going to do a water change tomorrow, but i dont want to take a chance of stressing him out even more. i've been keeping a close eye on him, the fish look like they haven't been messing with him. and last night i saw him laying on his side leaning againts the glass, what does this mean, i haven't seen him like that. please help!!!!!!!!!! i've had him longer than any other fish and i would be so hurt if i lost him 