So many times I read posts that end when the problem ends...and I think, hmm...wonder what happened the next couple days. So, here ya go.
Monday 1045pm: FC 21.5
Tuesday 6am: FC 21.5, passed the ONFCL test
Tuesday 930pm: FC 16.5 (lost 5.0 from 6a to 930p)
Wednesday 9:00 pm: FC 12.0 (lost 3.5 in 24 hrs) Much better than before this episode.
Thursday 930pm: FC 8.5 (-3.5 over 24 hrs again) brought up to 9
So I haven't added any chlorine since 5pm on Monday until Thursday night. That's been a nice change from the previous 5 days...
I'm still getting SOME black gunk, but nothing like that last pic. When I check the skimmer I sweep the waterline with a Miracle Eraser.
If you've followed along, thank you for sticking with me. If you are learning something, glad I could help.
