I have a very large cinderblock stand for 4 80 gallon cubes and looking back on it I would probably get a metal stand from over the edge too. While costing more it is not that much more and it would save a TON of space. In addition I could have a second shelf for more tanks (always good) if I wanted. I am not saying cinder blocks do not make a great (and very strong) stand, but they are very bulky.