Good on you. My kids got a lot of joy from ours. As youngsters they were in it every day during season. We had lots of fun with all the usual toys. I had a succession of I think four of the 18' diameter Wallmart things. I just dumped a load of sand, leveled it with a 2x6, ringed it with 16x16 cap blocks, and replaced it every three years or so when it started getting too grody for the chemicals to overcome. I bought replacements off-season on sale.