Leveling my reef tank

[Inversus]

But I can leave it like this over night?
Its like this for atleast 10 hours
I measured the distance from water to the end of Aquarium of All corners and wrote it down.

Now I know atleast what height I have to put in which corner

 

[SteveMM62Reef]

I’d put the feet back on and shim it off of those. Either use toilet shims, or a piece of rubber, same size as the foot, with a Durometer of 65A or 70A. I don’t like settling the Plywood 100% on the floor and trapping moisture.