We live in South Texas with a hard, clay soil. On top of that our pool has to sit in a low spot of our yard due to utility easements and code for distance from the house. The pool is 6 years old, and we are just now having it leveled out for the 3rd time. This time we have hired an installer and they have taken the pool down and are reinstalling it. My question is, is there anything we can do around the outside of the pool to keep water from pooling around it and causing it to sink? We are thinking of putting a retaining block wall around the pool and filling it with rock, but the installer says the water will just go through the rock and won't solve the problem. Should we fill it with sand or dirt and compact that and then put rock on top of it for decoration? Any help would be appreciated.