Margin of leveling error monster tank

[aMayZane]

I recently bought a huge 8'Lx4'Wx30"T 3/4"thick acryllic aquarium and stand from tsunami aquariums. My measurement from the top panel to the water line are as follows. And im wondering what my risk level is here. My shims are under the stand not the tank itself. I cant seem to squeeze out a perfect level which I assume is coming from imperfections in my slab foundation.

Back Right: 1"
Front Right: 1"
Back Left: 7/8"
Front Left: 13/16"
Front Center: 15/16"
Back Center: 15/16"

 

[Dread Pirate Dave]

Welcome!

I haven't had an acrylic tank myself so I'm not sure how detrimental those differences would be for it. There are others here with acrylic tanks though. Maybe they can help.