Iinstalled a new above ground pool this spring, it is a 33 foot round 52" deep salt water pool. I have everything under control but the PH, I will add the recommended PH down and for a few hours it will be in the range i would like. But, by morning like this morning its back up to 8.0. I have the Water Guru in the pool for daily readings and decided that i should not trust it. So i tested with my Lamotte Digital kit and my Taylor drop kit with new reagents this year and the Pool Guru is spot on. Is it time to use muratic acid and really drop the PH???