Pool has no free chlorine after adding calcium chloride

rdelisa

Bronze Supporter
Sep 16, 2017
88
Arvada
I added 10lbs of calcium chloride to my pool the other day. I am trying to get better control of iron stains so wanted to get my calcium up from about 250 to 400PPM. The water was perfect at the time. 5PPM Free Chlorine, 7.5PH, Stabilizer about 55. TA about 65.

Two days later I have no free chlorine. I shocked with 182 oz of 8% liquid bleach and turned the chlorinator up to its highest output. I'll test every half hour to see if free chlorine is holding. Pool water looks a bit cloudy.
My question is if the calcium caused this. Did I add to much at once?
 
This has been reported by others, but there is no chemistry reason for it to happen. Contaminants in the calcium products is the best that can be guessed.
 
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