I'm actually thinking about using some egg crate and some shelf pieces that I have lying around to put on the back wall, to give me some more ledges. That would add to the total rock weight. I did have a sump on this tank when it was set up before, I might just go back that route, since it made water changes much easier and will give me more leeway with more rock and filtration and a place for macro to grow. I have a 10g with 10 pounds of rock in it, and I have to say, I'm not impressed with the glass box of rocks effect it gives. Leaves almost no sand or swimming area. Thanks for the advice y'all...