I thought you did not want clowns lol. Anyways as long as you don't over feed a lot they should be fine. As far as what size to swap them for new ones it depends on the size of the tank if you get a taller tank compared to a wide or long tank you would need to get re-home them sooner.Awesome! I think I’m going to try and track some down. 4-5 sounds like a good number, and I’ll check with my lfs about taking them back years down road when theyre massive. Just out of curiosity, could 5 of these guys take care of the bottom feeding in a 125 by themselves? Of course ill feed them their own mix, bit I just wasnt sure how good of scavengers they are. In addition, if they are the only bottom feeders I have, at what size would be too big to keep? 8”? Thanks!