White clouding with the addition of granular dichlor

[swansons pool and spa service]

Every time I add Dichlor to my clients pool the water begins to cloud white in area chlorine was added for about 5 minutes then clears. It also has trouble holding chlorine. Each week, summertime, San Diego, I add 1 to 2 lbs of di-chlor and 2-4 tri-chlor tabs. When I return the following week the chlorine level is scarcely above 1 ppm. The pool is not much more than 10,000 gallons. The conditioner is a little high as well as TDS, everything else is in range; ph, alkalinity, hardness, no phosphates, ect. The water stays crystal clear aside from the clouding with the addition of chlorine. Any help would be greatly appreciated.

[chem geek]

For every 10 ppm Free Chlorine (FC) added by Trichlor, it also increases Cyanuric Acid (CYA) by 6 ppm.
For every 10 ppm FC added by Dichlor, it also increases CYA by 9 ppm.
For every 10 ppm FC added by Cal-Hypo, it also increases Calcium Hardness (CH) by 7 ppm.

So your CYA level isn't just a little high. CYA moderates chlorine's strength so as the CYA is high, if your FC is below 5% of the CYA level then algae can grow faster than chlorine can kill it. Read the Pool School for more info.

[Guest]

Would the high CYA cause the White Clouding in the area the chlorine is added.
I am not having any issues with algee growth in the pool. My main issue is whu the water is clouding when the Dichlor is added.