I don't have enough bioload in my 2'x4' frag tank, so I need to pick up a bunch of fish to start pooping in there since all I have is a mandarin. I'd like to avoid jumpers, delicate fish that need constant feeding like some anthias, fish that need algae like lawnmower blennies, and chromis since they kill each other off, but am open to ideas on fish that have a 0.00% chance of ever nipping or damaging any corals. So far all I've got in mind is a fathead anthias and Tomini or similar tang, maybe a pair of some kind of clownfish. Any suggestions?