We purchased our pool last summer. Had it set up and it ended up sinking on the one side and busted out the seem. Because it happen a week after having it we got it replace. So my question is how can we get it set up so the poles DO NOT sink. I have heard to put sand down but then I have also heard not to. Please please please help me out. My kids love the water and I just want them to be able to enjoy it this year. And also what types of things should we buy for cleaning. Any advice helps! Thanks sooooo much!