
Looking for some thoughts and suggestions.
Just tore down a 21' above ground with a sloped bottom, was "suppossed" to be in good shape when we bought the house (in winter

Liner was decent but pool was off level by about 5-7". Had a "professional" tell us that it should be fine for at least another year. Needless to say i wont be contacting him again.
I decided that a new 21' is in order. Problem is the current base is sloped and new pool in transit is flat bottom. Current base is about 1-2" sand on top of undesturbed soil.
So to the questions?
What would be the ideal fill for the sloped bottom? Limestone screenings or 3/4 crush gravel then level with sand.
Or
Dig up perimeter to the lowest point? center drain level then level base with 1" sand. This idea would sink the new pool below grade however and im not certain if the pool we bought can be sunk in.
Any help would be appreciated thanks.