Hi, just found this while searching for help and really liked it so i registered.
I just completed my First Pool setup. A Oval 18x33x52. The Ground is level within 1/4 inch anywhere thanks to a borrowed transit. The elevation required me to dig down about 25 inches on one end to get it level on the low end. The straight section buttresses setup was well lets just say very involved.
After getting it All setup and Filled I noticed one buttress was leaning out and the foot was lifting . Called the Mfr they suggested I empty the $600 of water. From sandy soft soil and generous liquid sunshine the buttress support blocks required a bit more support so it sank down about 1.5 inches.
The fix was to dig two holes beside the buttress/support blocks re-level and fill with 5000 psi concrete. I added 1 yard more of sand by buckets tossing over the wall (total 2 1/2 inches now) and reinstalled the Liner. Matched the skimmer hole best I could and used the 'Big Vinyl Patch kit' for the difference.
I feel I could give some good info to anyone doing an oval pool now that I have experienced this event. I know a support person at the Mfr now reasonably well. James and I have worked thru a lot of concerns, worries, encouragement, etc...
I am still digesting all this chemical level stuff, I do Computer Servers and Networking and it is way easier that pool chemicals
Glad to be here now.