Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
My 'cabinetry' skills are more 'rough carpentry' than 'finish carpentry' and most of my stands end up that way- maybe 1/8" out of square. One corner up, another down. The weight of the tank squares it up. Other suggestions above are really important:
See what it looks like in place- I have one area that is really bad, 1/2" difference front and back. Does not matter how good (or bad) the stand is, it needs a block, not just shims! Any twist in the top can be corrected then, too.
Here is how I handle it:
1) Set up the stand where I want it.
2) Plumb, level, square, using shims as needed. The twist might straighten out here, or it might not.
3) Add 1/2" thick Styrofoam.
4) Add tank. If it is a heavy tank it will usually straighten out the stand.
5) Add water, checking the level as it fills. If it gets more than 1/8" out of level when it is full I usually drain it to make it easier to add another shim. Then fill and check again.