If a pool doesnt have pressure release valves that keeps the pool from floating and it has not rained in a long time. will a pool still pop out or float? I am curious about this question too. Would the plaster crack even if the pool is lets say at least 6 months old? Is their still enough moisture under the pool from the pool it's self or does ALL the water in the pool stay there and not past the plaster? I have asked myself this question, If I were to look under the pool while the water is still under there, Is the dirt completly dry? Just wondering. Thanks.