IS AQUARIUM OUT OF LEVEL ?

Question

I just bought a tank 4x2x2 foot, 10mm thick. I've put a spirit level to check the four sides (vertically) for plum and noticed the back wall of tank is running out of level 3-4mm, the tank itself horizontally is level Will the back wall be a problem

Answer 1

WELL NOT REALLY. LOL.. UMM JUST MAKE SURE THE FISH ARE OKAY. IT'S NOT LIKE THE TANK IS GOING FALL APART. HAHA. DON'T WORRY