Good to know, I will pick one up tomorrow and modify the shelving, what type of wood did you use susankat? I was thinking some 2x4s cut width wise to help support instead of particle board. Similar to the steel shelfs in the link I listed in my first post.
Only thing I was concerned about was the width of the tanks wouldn't be on the metal edge, they would be on the wood. And I doubt the length of the tank would be touching the metal rim as well.. so the wood would basically be holding the tank. But its gotta be better then the wire shelf I have no bowing in the center, except if the wood bows it'll snap.