This has been a total nightmare from the start. Bought the pools, took them two months later to installed it. They told us it would work on a slope we had in the back yard. They said they use some type of "sludge" to keep the pool from caving in. Well guess what, yep the pool caved in. We haven't used the pool less than 10 times! My wife and I have called and owners would never return our call. We talked to some other man that works there about this problem and he will NOT call us back. Now we have to get an attorney to solve this problem. Do not trust these people. They are not trustworthy! They are very unprofessional. Save yourself the trouble and money, go somewhere else!!!