I did the Chlorine Drop Test at 8 AM this morning and got questionable readings. After adding the R-0871 powder to the test water the solution did NOT turn pink. It stayed clear. I thought maybe the R-0871 powder was old so I tried some I had recently purchased. Same results-- clear. What is going on? What is my FC? I thought I would then try to measure the CC. I added the 5 drops of R-0003 and the water turned slightly pink. Two drops of the R-0871 caused the water to turn clear. Will someone please explain these test results.
The pool is covered with a solar blanket and has not been used in several weeks. I removed the blanket and there is no visible algae anywhere in the pool. Water temperature is 80 degrees. I last did the Chlorine drop test on 21 Sep and the FC was 7 ppm. We have had in excess of 5 inches of rain the past week.