CarlD,I appreciate your help. The pool store I go to is family owned an very expensive on their chemicals, but their computer water test, has been used by me for over 5 years. Sometimes I buy the chemicals there, sometimes I go elsewhere. The owner's son has been doing my test himself, he is trying to figure it out. In fact , when he said to throw in 2 carboys of LC, after having already.purchased 2 three daya prior, he threw in the second carboy for free. He had called his chemical manufacturer and spoken to the chemist there and went through all my numbers with him, they suggested the calcium hypo instead of LC,(which their company also sells to the pool store) they said to throw in the 3 bags tonight and test the FC 3 hours later and then tomorrow morning. I did the FAS-DPD test tonight after the 3 hours. It showed 1 ppm of FC and 1 ppm of CC. The chemist suggested 3 bags per 10k gallons of water over the weekend if the FCL doesn't stay in till the morning. I don't want anymore calcium hypo, my pool will be clousy for a month, how much LC should I put in ?thanks