I have a 55 gallon with six 2"-4" Afircan Cichlids and one 4" Pleco. Last week i noticed my plecos eyes were injured, I suspect he was being attacked by the Cichlids, and last night I noticed his eyes were completly gone. The pleco seems to be actting normal. The pleco has been in the tank since I started it last feburary. Is this mormal? Will the pleocs eye grow back? What can I do to keep this from happening? Can I get a more durable pleco?