I have a 72"x30"x25" tank filtered by a 75g sump with Laguna maxflo 2900 pump. Current stock is 3 sd, 5 clown loaches, 2 psittacus, 2 severum, 1 crenicichla Venezuela, 1 polleni, and 4 IT datnoids. I'm thinking about getting rid of the datnoids, may keep 1. I miss the action of geophagus but know the pike, and psittacus aren't going to work with some species. Any suggestions? Always liked hump headed ones but steinies might be too small, what about pelligrinni or the crassibillis?