Hello, my name is Matt Gregory. I'm currently in the process of setting up a 26' Intex Ultra Frame AGP. I've been reading about what a lot of you all use as underlayment. I was interested in using the pink foam insulation that I've read that so many of you all use. My question is this. That stuff is expensive. I've figured that to cover my pool I would need no less than 25, 4x8 sheets of this stuff. The 2" insulation is $36.73 per 4x8 sheet. That's roughly $920 before taxes. That's more than I paid for the pool itself. What gives? Am I missing something? What did you all use? Is there anything more cost effective?