Hello I need some catfish to pick up the left over food in my fish tank and clean the bottom of my 75 gallon jack dempsey tank. All my local fish store has is corydoras, but they are too small for me! What are some good catfish that get a good size to clean the bottoms? My lfs does have striped rapheal catfish and sun catfish. I have kept rapheals in the past, are these ok with jacks? Sun cats, I've never seemed to get them to eat in the past. Considering trying agian, always seemed to like them. Thoughts?