I have a 30g cube, with 30lbs LR and around 25lbs lace rock, about 25lbs of LS, 175w MH, 2x24w CF's, 150g seaclone, and a rena filstar filter. Right now it is stocked with 2 common clowns, a peppermint shrimp, a green brittle star, a purple pincushion urchin, a cleanup crew of just blue leg...