I may be bringing this issue here a little too early. Since opening my pool this year the water had turned cloudy on the second day. I am someone that has always taken the water to the pool store to have it tested and in between even used strips to keep an eye on the chemistry. After this problem I have now found this site and purchased a TF-100 Pro test kit (due to me Friday) and will start taking control of my own pool water. I have always used BIOguard products and I used their pucks in an inline chlorinator and their granular shock, A trichlor an dichlor product. After going to the store with the cloudy water sample the free chlorine was 0 and CYA reading 114. They told me to pour in 14 scoops of the granular shock to "break" the bound Chlorine. I did that took a test in (all the while the water is getting cloudier) the next day and got a 0.4 free chlorine and 136 CYA reading. they began to try to tell me to turn the pump off and let it "settle". I asked if the CYA was too high and if I needed to drain the pool and put in fresh and they said no. Now i know through reading on here and other places that the CYA is much too high. I drained 50% of the water and filled it back up yesterday. I turned off the puck chlorinator and dumped 1 gallon of liquid chlorine in the pool last night, I waited 30 minutes used a strip and got next to 0 free chlorine reading the CYA on the strip had come down considerably from yesterday. I dumped another gallon of liquid in the pool and then waited till this morning with the filter running. this morning the water was much clearer but same result on the strip. I put in 1 more gallon of chlorine and came to work. I know i am in a spot where i need that test kit. I don't trust going back to the store but i cant figure out after draining 1/2 and re filling that I still have no free chlorine. Luckily its hasnt turned green but i am afraid that is coming if I cant resolve this issue.