I'm ready to close the pool this Friday morning. This evening, I added 4 jugs of bleach to get the pool to a high Cl state. For my pool, it should have raised about +36ppm. The pool had 5ppm Cl in it prior to adding the bleach and the water clarity was very clear. I'd been having some issues with either pollen or yellow algae the last few weeks - water was clear, but some round brown dirt-like substance was appearing daily but would disintegrate upon swimming. Water remained crystal clear the last few weeks of the season as it was this evening. I test Cl every night and add accordingly to Best guess chart.
Well, after I added the 4 jugs, the water turned cloudy - you could see plumes of clouds rising from the bottom of the pool! I was shocked that just by adding bleach, this occurred. I'm a long time BBB user and this was the first time adding bleach to very clear water caused such a reaction.
I didn't test Ph or Alk today, but last time I did check was over the weekend, the Ph was 7.2 and the Alk was 80. Had to add about a lb of baking soda to get to the 80. Haven't tested the CYA in a few weeks as the pool was holding at 50ppm most of the summer with checks about once a month.
I checked the bleach containers to see if I had purchased the wrong bleach - but it was plain Clorox.
I'm perplexed - and also nervous that I'm closing shortly and the pool now has an issue which I never expected.
I will have the pump run continuously and got out the Slimebag.
Any ideas of what could be the issue? Could the bleach have been contaminated? The pool light in the deep end can't even light the shallow end it is so cloudy.
In looking over some other posts:
I wonder if this could have been caused by Calcium in the water per the second post? I did add Calcium, probably 2 months ago, can't remember how much was in the pool, I think it was around 150 or 200. The only other thing in the water might have been some Metal Magic - probably added maybe 3 weeks ago. So only thing that went into the water this season was bleach, baking soda, CYA, Calcium, and Metal Magic - with the usual decent results.