55 Gallon, 50 lbs live rock, 50 more coming soon, 60 lbs live sand, siphon overflow, 20 gal sump with heater, 50 micron pad filter, bio balls, and a protein skimmer, returned via one 800 gph pump through 4 vortex flow enhancers, 2 350 power heads. One blue legged hermit wondering around....