Pool has been open for a month now with a good amount of use and water looks great. Definitely a TFPC believer and have found this site and it's members to be a wealth of knowledge and experience. I've been reading up all winter and having a blast putting everything I've learned into motion. This is only my second year being a pool owner and I think I was headed towards some problems due to the lack of knowledge about cya and chlorine levels/ relationship. Just want to thank everyone. My next step is to become a supporter.