Help! I've been using this site as a reference for a couple of years to much success. This year, I cannot seem to keep Chlorine in my pool. Readings are as follows (and have been confirmed with testing at home and at local pool supply store):
Calcium Hardness: 30
I cannot recall the exact readings for the rest of the things the pool store tests for - but they all registered normal.
At the beginning of the day after adding approx 3 jugs (just under 1 gallon each) of Clorox bleach, the FC and TC are around 3 ppm. By the following morning, the FC and TC will both be 0 ppm. The pool gets 8 hours of sunlight per day and the water temperature currently fluctuates between 87 and 90 degrees Fahrenheit. The pool store said it is because I am using liquid Clorox rather than the granules they sold me in the past. But, I had some granules I bought earlier this year and I added 5 lbs one morning, and the following morning the FC and TC were back to 0. Is this normal? Any suggestions on how to keep the chlorine in the pool?