I'm installing a wavebox on a 220 g. The issue is that I've leveled the tank about three times and it settles on one side everytime. I'm at the point that I think the glass is heavier on one side than the other. But the question I have doesn't concern that it is how much pressure will the box put on the oposite side of the aquarium? Do I have to level it again? I know it is optimum to have it level but each time I level it with new foam, it resettles to the original position so I don't think it is possible. Will 1/8" effect the operation that much. I've been told no but I'd feel better to know how much pressure the box generates.