i have a tank of mixed cichlids and one lonely gurami. now we just lost our plecko to some aggressive behavior in which he lost both his eyes, his nostrils, and his fins. they were great tank mates for nearly a year. is there any other fish that can mix with the community to help keep the tank clean? would a plecko much larger than the cichlids stand a better chance? our last one was about 4-5 inches when he died. the average size of the cichlids is 2-3 inches.