[dayhiker]

My tank is sitting on a 3/4 birchwood base which at present time is level within a 1/16 at all corners front to back and side to side. My concern is the tank and stand settling the front of the tank is sitting on wall studs but the rear is setting on a custom stand . Should I put shingles under the tank to allow for settling/ uneven surface and top prevent stress.. Oh the tank is empty right now it is a new setup...75 gallon.

http://good-times.webshots.com/album/563627478amCTlx

 

[BillD]

Don't shim the tank, make sure the base is level. If the base is not flat (any type of irrgularity such as dips or high spots) styrofoam can be put under the tank to absorb the differences. Styro will not level a tank, only absorb imperfections.

 

[prov356]

It sounds fine, just fill it and check it to see if the weight throws it off significantly. If it does, then I might worry more about what's supporting it rather than whether it's level. If it throws it off a little, do like BillD says and shim the stand.