I've been doing the BBB thing since I opened the pool in early March. Everything has been going smoothly with just a few questions here and there. My pool has never looked even close to this nice.
Anyway, yesterday when I tested first thing in the morning, I had almost no chlorine left although the water still looked great. My daughter is coming in for a visit and it would have been a disaster if the pool wasn't in order. So yesterday I kept adding chlorine and this mornings test was not that good as well.
Long story short, my chlorine usage is coming back down and all should be well when my daughter gets here tomorrow.
I'll do an OCLT in the morning just to confirm things but so far things have fallen back into place.
I wouldn't have known a thing unless I was educated about pool chemistry. The pool would have just turned green.
My point is that I caught it in time and did what was necessary to eliminate the problem before it ruined someones vacation.
Thanks to everyone on here. My daughter would have been crushed if dear old dad didn't have the pool in good shape.
Without the knowledge from this forum, not only would I not have known about it until it was green, I couldn't have fixed it even if I did know about it.