I think I can offer some advice on the importance of the center support in your tank. Not long ago (about 3 hours, to be exact) - I awoke to the sound of water, yes water, spraying all over my living room. After limited investigation, it seemed that the problem wasn't a pump, or a clogged overflow, but a crack straight down the back of the tank. Yep, top to bottom. As I stood there relatively helpless, I watched the first half of the 110 gallons saturate the carpet, and enough wires that con-ed should worry about the competition. Thank you so much to Jon Noble who (firstly) answered the phone at 2am on a Sunday night, and then came over and helped me since Eric is out of town. We saved all the fish and made a makeshift 'tank' out of the sump and separate 30 gallon tank. The 200 lbs of live rock are in the tub nearly covered with salvaged tank and RO water. What a disaster. Anyways, the moral of my story is 'yes, Eric the center support on your tank is important' and thank you so much to Jon. It would have been very hard to survive this disaster without him.