It is a 55gal with 50lbs live rock. Crushed coral substrate. I am running an emperor 400 filter, a Prizm skimmer, 2 maxi jet power heads (1 400 and 1 1200). I have 2 Ocellaris clowns, 1 3 striped damsel, 1 blue devil damsel, 1 neon dotty back, 9 snails, 2 hermit crabs and a sand sifting...