I've tested my FC and TC using my 2006-C testing kit each day for the past three days. Each time, the water doesn't turn pink when adding the powder (even with 10 scoops). This would indicate zero FC or TC. That said, I added 2lbs of shock to my pool this past Saturday and added three gallons of bleach yesterday. This is all while having 1 chlorine puck in each of my 3 skimmers. My CYA is 60 today (so a bit high but not crazy). I have a 40,000 gallon cement pool with cartridge filters FWIW. PH is normal at 7.4. I'm at a loss of what to do. Also FWIW, my pump isn't working very well (there's low-ish suction in the skimmers and low-ish velocity on water coming out of the returns. It's being replaced on Friday.