I have plenty of room, the thing is I have a couple really big dense pieces at the bottom of the tank supporting the rock work, I actually have a lot of open space. I may be overstating the number as its been a while since I took it apart and put it on a scale
The more I think about it I think I'm really closer to 200-250lbs in the display tank, I've sold off some rock in the past year and didn't take that into account in my calculation
