I've installed my pool and things have been great. Last week I noticed I was losing water. After inspection, I realized the pavers I put down under each foot are "poking" through (basically I can see the square shape of the paver from inside the pool). Not all have done this. However I'm pretty sure this is where the leaks are coming from. I've manager to pull two of the pavers out and reset them. I just need to the same with the rest of them. It is just messy muddy work. I will be taking the pool down in Sept (probably) for the year until spring.
In order to avoid this issue next year (live and learn), would having a 15' x 15' concrete square pad poured be a good base? Concrete doesn't self level either does it?