Need advice for leveling aquarium

[ReefOcean]

So After I built my stand, it was a little off level, not by much So I figured I would just get some paint stir sticks for shims....

...but I put my tank on the stand and one of the corners is actually lower the the others so the front right corner of the tank is about 1/4 inch from the stand. I have piled and jammed 1/8 fiberboard underneath the corner to make it so the tank no longer titer-totters, and the tank no is perfectly level.

The tank is a 24x24x16, it has black trim on the bottom

What would be a good solution to this? Just run a shim under the tank? Taking the stand apart is not an option sine it is all glued, screwed and painted.

EDIT: Some pics