Hello, I am going against my better judgement and setting up a Intex 18x9 Ultra this week. I will be leveling the area with 1 1/2 tons of mason sand and it should be ready by this weekend. I originally was thinking to over engineer the pad by making a ''box' out of treated lumber to fill with sand but seeing the posts of those with similar pools I don't think its worth the added expense and work. I plan to use patio blocks under the legs to displace the weight and do most of the leveling. I had a small ring type pool last year and my family really enjoyed it but I found the chemicals a bigger chore than I thought. Any thoughts on salt systems?