I've been itching to get my tank up and running and get another octopus, and the only reason anything is on hold, is because I can't figure out how to make my tank level, in a way that won't leave me worrying it's going to collapse. My apartment floor has a downward slope at an angle (the left rear corner is about 15mm higher than the front right corner). I've tried shimming, like this: Although I got nervous when someone told me there was no support in the middle of the stand. The tank wasn't perfectly level anyway, so in order to get it level, I had to do this: There are shims on the right side, they are just pushed in more than the others. This resulted in cracking in the stand! So, I dissembled it, and haven't had it properly running since. I don't seem to be able to use shims, so what are some other options to get the tank safely level? What have folks used in the past?