well usually when my fish crap or wha ever, I try to clean it out my tank with a net so it won't make my tank too dirty. Like day ago I got a Oto or somethin algae eater. TODAY i saw one of my red platys crap and was about to clean it out untill suddenly I saw it eat up the crap. I was like . WoaHh. GREAT! I didn't expect it. So then i just thought I put a a slice of zucini near my plant and they love it! my platys dun really go for it but the AL eaters seem to like it and so does mah shark.