At my wit's end. Received my TF-1000 kit on Thursday. Began testing to begin shocking pool to eliminate algae.
Initial test, 8/9:
Calculator stated that my target FC should be 16 to shock. I miscalculated on the amount of bleach and added a little more than required. I continued testing throughout the day and evening with FC levels reading above 20. I did not add any additional bleach, but there was no change in the green color. I did brush pool 2 or 3 times.
Referred back to the chart and calculator with those new numbers, getting a target shock level of 22. Added additional bleach and continued to test. FC levels varied throughout the day as: 25, 23, 19, 22 adding the recommended amount of bleach when FC dropped to the 19 reading and continued to brush the pool as best as I could.
Did a final test at 9pm last night with a level of 20. Added 107 oz. of 6% bleach per the calculator.
CYA:42 (Was between 40 and 50, closer to 40)
Using 50 as the CYA level and a target shock level of 20. My FC level appears adequate for shock level. Did NOT add any additional bleach. I backwashed the filter, it was very green and gunky looking.
Further testing so far today at 2 hour intervals gave me readings of 21 and then 23.
I have NOT put anything into the pool but my FC numbers are rising??? I am completely perplexed. I am obviously doing something wrong and have spent hours reading through the pool school and other posts searching for some answers but can't seem to figure out what I am missing. Please help.