- Jun 14, 2012
- 2,668
- Pool Size
- 13500
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool Edge-40
Catherineb said:Hi Brushpup, I bought the rest of the bleach today. I promise I am going to drain about 70% the pool but not until next weekend. Until then, can you clarify that by adding all this bleach it will reduce the amount of CC?
Last night I added 3 gallons of 8.25 % bleach and today my FC is 4 but total CC is 30. If I continue and add another 5 gallons of bleach today, will that destroy the CC in my pool? when should I expect to see the CC come down? straight away or like in a weeks time? Is a total of 8 gallons at 8.25% to do this? I intend to do this later when the sun goes down. Hopefully I will get your reply by then. Thanks for your help.
BTW - This problem all started when I added 15lbs of copper stain remover from Bioguard which did not work (although the test kit did) this is how my pool sky rocketed my CH. Then I added 26lbs of powder shock to breakdown the CC which didn't work either but only raised by CH. Nightmare.
That is why I ask that this shock of 8 gallon liquid chlorine will in fact be enough to break down the CC. I still want to do this exercise so I know this for the future although once I do my drain it should get rid of all these problems and I can start again with my chemicals. Hope all this makes sense.
No one here can definitively answer that set of questions. The variables are too many and too hard to measure. The likely outcome of dumping in enough bleach to reach and maintain the shock level consistently until the water improves at your cya level is the same as doing so at a lower shock value with lower cya - but in both cases it is unknown how long or how much chlorine over time will be used. It is certain that you will use a lot more test reagents with the higher cya and subsequent shock levels. It is also likely that you will not fully clear the water in a short time and when you dump a portion of the water you will be wasting whatever amount of chlorine you have in the water you dump.
Also when you say you measured a CYA level of 150 I'm not clear if that means you got 75 with a diluted sample or something different, can you clear up my confusion?
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