As many of you know, in about three weeks, I'm breaking down my 500 gal reef and replacing it will an 850 gal reef. This tank will be unique in that it will have the same viewing panel ( 72 X 30 ); but, will have a depth of 90 inches..... which will enable the aquascaping to resemble a long, winding central canyon with corals on each side. I hope to break down the old tank and replace it with the new tank in 48hrs. To accomplish this, I have to build the components that need to be upsized in advance. This weekend, I finished the light hood which holds (12) 400 watt reflectors, plus (6) 165 watt vho's. The hood will be on a sliding rail system (just like the 500 gal tank). The next task is to build the stand extension.