Hi and thank you for welcoming me to the group. I have a 18 feet like an Intex. And last year we got it from my sister in law. So it's a few years old, but in pretty good condition. So after leveling the land and everything. We put the pool up. But after filling it up, one side, about 4 or 5 stands sunk into the ground. What can we do to fix it? Or correct it?