I'm in the process of setting up my new 150 Gallon Planted tank. 72X18X24

I've noticed a 1/8 of an inch slope along the width of the tank and a 1/8 of
an inch slop along the width. First is this something to be worried about?
If so, what's the best way to level the tank?

The tank is sitting in an All-Glass stand which supports the tank all along
the edges, but the bottom area is open.

Any suggestions/comments would be great.

TIA
Ian