i have a large albino pleco hes about 6 to 7 inches and he does fine with my lake malwai cichlids, the only time he ever gets bugged is when i drop in the algae waffers as my cichlids love them too. but my pleco is big enough to run them off, and then the cichlids wait their turn. i also have a chocolate zebra who will only get 4 inches or so now he stays in the commuinty tank, cause he would get picked on. however my upside down catfish is in the tank with the cichlids and they never ever bother him.