Hi. Instead of making a mulch bed for my 16' round Intex pool, I'm using the deck platform I made last year. The studs are warped a bit, and while I can get them somewhat straight with shims, I fear they'll be a little bowl-shaped once everything settles. I'm finding that if I put a longer shim under a stud, it lifts up the other side and pulls it out of level.

What implications will a concave shape have on the pool? I don't know how to attach a picture, so imagine a16' across octagon-shaped deck with the studs 12" on center, supported by shims to level it and keep them from bowing under the weight, and 2-layers of 1/2" plywood. --Thanks