I'm wanting to sink our 16x32x52 rectangle intex ultra frame agp about 2.5 feet into ground. I've researched & I think building a retaining wall will work. My question is how do you create a drain so that rain won't fill up the hole around the pool. We're going to put a deck around it but probably about a month after we get the pool up. Any suggestions & pics are welcome, I can't find a lot of info on these pools.