The water in my pool hasn't been crystal clear for a few days now, but it hasn't been cloudy either. For several days, if I brought the FC up to 4 or 5, by the end of the next day it would be around 1.5 - 2.5, then I noticed the water getting dull.
The last full set of numbers I ran was Monday evening:
FC = 1.5
CC = 0.5
TC = 2.0
TA = 90
CYA = 40
Had to go out of town for a couple of days, and when I came back it was still more of the same but a more dull looking (still not cloudy).
FC = 0 (I can't remember what the CC was - I didn't write it down)
About 2:00pm, I replaced the filter (it was all clogged with dirt apparently) and put all the bleach I had in the pool, which was only enough to bring the FC up to around 9. A couple hours later I was able to go to the store and get some more and bring the FC up to 16 (CC was 0.5 - if the water is even faintly pink against a white card, I'm calling it "not zero").
I did the overnight test last night. After dark, FC was 17.5 and CC=0.5, this morning (although the sun was up this morning, it wasn't shining directly on the pool) it was 16. CC was still 0.5. Water is clearer than I've seen it in days (dirty though, needs vacuuming).
What would be the best next step?