180g, unplanted, with about 20 tetras, 5 clown loaches, 3 bala sharks, 1 rainbow shark, 1 common pleco, 1 bristlenose pleco, 11 corys, a couple of platys and a couple of guppys. I have sponges and filter floss in the filters now. I also have ceramic donut shaped things, but I haven't put that in. I guess I just want to keep my bacteria alive and help filter out waste. The emperor has 2 biowheels if that matters...