Thanks - I added some bleach last night and have the FC up to 16.5 ...TA is 20 and ph is still < 6.8 (using the OTO test kit was strange - the chlorine side was red and the ph side was yellow!). When adding the mule team - do I still need to go 1/4 box at a time directly into the skimmer? Can I spread a whole box around the surface of the pool? I will try to pump some of the water out to reduce CYA and stick a hose in to refill as I go. Thanks for the response!