I'm a little confused... my pool (in ground, 33,000 gal.) is just slightly cloudy, and no signs of algae. The chlorine had run out while out of town for a day, so I figured that's why it was cloudy. I shocked with chlorine and over the next few days it cleared up to a point. Deep end still a bit cloudy. After I shocked and the chlorine started drifting down, my numbers were FC 5.6, CC .6, PH 7.4. Seemed like all was good. The next day, FC 4, CC 2.8, PH 7.2. That was confusing... why the raised CC? Then hubby said he opened the chlorinator and maybe the stabilizer from the pucks was too high. Checked that. CYA is low! Black dot never disappears when tester is filled to brim. I read that maybe a non chlorine shock may bring CC down, so tried that yesterday. CC came down to 1.6 last night. This morning, however, it's back up to 2. PH is now lower at 7.0, so I added PH plus an hour or so ago. I don't want to get in to this unending balancing game, though. Any suggestions? And any idea why the CC would be high? Btw, I test using the Taylor K2006C. Thanks!