Our 27' round AGP will be installed on June 10th and I was told about TFP by Zed88 who has given me a wealth of information already. I grew up with an AGP but that was many years ago and I'm excited to "dive" back in. Sorry, bad pun. We live in Northern Illinois, so, swimming season is limited. We'll be looking for ways to make every day a good swimming day from Memorial Day through Labor Day at least.