I was trying to find a place to put just one more tank, as you do, and I saw that we had a nice little wooden shelving system. It's about 1820mm, 1220mm wide and 290mm deep. It's kind of wobbley, sways from side to side and seems to tip foward a little bit. I don't think it could hold anything bigger than a 1 foot tank at the moment and even then I'd be pushing it. I was thinking about putting braces underneath each shelf and perhaps taking out some (they're adjustable) to leave more room to work in and around the tanks.
I kind of need an engineering/technical point of view on this one, what is the best way to strengthen it and stop it tipping foward?
I'll try get some pics up when I find the camera but I've just done this quick SketchUp in the meantime.
-Thanks