The tank is a 180 gallons oceanic 6'x2'x2' with 6-160watt VHO bulbs,4 bulbs in fan cooled aluminum fixture 11"x5"x72.5" and 2 bulbs in fan cooled aluminum fixture 7"x5"x72.5" home made units,with 130 pounds of use asst.live rock,75 pounds of Fiju live rock,10 pounds of Gulf worm rock,55 pounds of base rock. There is 55 pounds of live sand on top of 40 pounds of crust domite,with a 1.5 inch plenum.