I have 55 gallon tank. With Danios, barbs-2-,platys, tetras, might be a couple of others can't think, at work. Oh yeah, and 6" bass! hahah! I fed the pleco wafers it ate algae and it was about 4" long. It was fine for a few weeks then died. Snail couple wks. I think. No extra food just algae on glass and fake plants- does this help.