the tank they are in had been empty since i moved the other two rbp's i have into the 90 gal and i hadent done a gravel vac or anything so when i put them in there was alot of mess that came up from the gravel and the entire top of the tank is covered with water lettuce so thats what all the flecks are
oh right im with you now i think it would av been safe to put them straight in with your others m8 thats what i do, i even put a baby in with mine when they were 5" and they seemed to look after him it was wierd as ive never seen them do that before