I am in need of assistance from all of your combined wisdom. I cannot seem to tame the bleach eating beast that is my pool. Here is the story. I have a 17,280 gallon vinyl lined inground. Last year I was "duped" into the money pit that is Baquacil What can I say, it was my first year as a pool owner and I didn't know better. Up until Mid-June this year I was using Baquabeast until I made the investment in a new liner and sand filter (over 10 years old and very much due.) Prior to the change I was experiencing severe green algae and very hazy water that I could not tame no matter the amount of algecide and shock.

Needless to say, after the refill I started on BBB and have been overwelmed by the improvement in my water quality. I am using a Taylor FAS DPD to track my progress 1 to 2 times a day, adding bleach at night and testing in the morning. I have a opaque diamond 12 mil cover and the pool is 4.5 deep. I am losing about half my FC a day and little to none at night. My filter runs a night for 10 hours. I am putting a least a bottle a day in and the weather is 80 to 90 and sunny. Bather load is average and seems to have little affect on my FC.

I have two possible conclusions: (1) My solar cover is letting two much light in during the day, especially since I have a shallow pool. (2) I am fighting the residual Baquacil that could be in the piping, if that happens.

Is it too much to keep adding 3 qts a day?

Tonight
FC 2.0
CC 0.4
CYA 40
PH 7.6
CA 110
TA 110

This morning
FC 5.4
CC 0.2
CYA 40
PH 7.6
CA 110
TA 110

Thanks,
Joe