bare bottom empty shells. homemade rock caves,archs,ledges,seeded with live rock.approx 110-140lbs of rock.sump will have algae scrub then dump into live rock then returned to tank also i plan on running skimmer and kalk reactor in about 4-6 months vho lighting 640watts. corals zoos,leathers,a few acropora a few fish as well in future my tank has been set up for 1 month.just want to do it right the first time