Very High Chlorine

foodog

Member
Jun 11, 2010
13
Hello again everyone! I posted a week or so ago about my high CYA of 100. I am still getting used to the BBB method and all seems to be going well, except one issue. I got my CYA down to 70 on Friday. I used the pool calculator to determine how much bleach I needed to bring my 0ppm FC up. There were numerous swimmers in the pool the day before so I also figured I would want to shock. The CYA chart indicated I would need 7, 182oz bottles of bleach. I poured only 4 in thinking 7 was way too high. On Saturday morning I checked my FC with the TFT-100 kit and added 61 drops. If I have done my math correctly that would be 30.5ppm. The level is maintaining and does not seem to be coming down. Tested again on Sunday and this time I added 60 drops, still at 30 ppm of FC. First I could not maintain a normal FC level and now it is way, way high. Any ideas from the experts?

Thanks so much!

FD
 

foodog

Member
Jun 11, 2010
13
John, thanks for replying. My pool is 17 1/2 x 33, about 18,000 gls. Vinyl, 4ft-6ft deep.
 
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