So here's my problem. I just brought home a 90gal tank that I bought from a member at another site. I get it home, and discover the sand is unlevel as all hell. So, how do I level it out? We fought with if for a bit by putting cardboard underneath, layer by layer, trying to get it even. But, its late, and just when I started to get it so it wasn't too wobbly, I'd add another where I thought it needed it, and it made it worse. I'll fight with it some more tomorrow, but I'm wondering if anyone has any suggestions? How do you guys level out un-even tanks and stands?