Take it from me, I have a 180 gallon aquarium
, but in 2009 the stand was not sturdy enough, and over time it bent and made my tank crack one night out of no where, and then flooded my house with water! My old stand was made out of plywood, with a formica counter top.
So what they had to do to secure it was, they used a custom made strudy steel frame on top of the wood base, then they used granite for the counter the tank sites on. It's now been sitting there nice and sturdy for 6 years now!