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    How much CYA is ok for your health?

    Hi folks. I own a 380 gal spa and I'm using dichlor as primary sanitizer along with HS silver-ION cleaning. I cannot go with the "dichlor then bleach method" since Klorox is not available where I live. I found clorine but the concentration is only 3.75% and PH is 13. (I'm in Sweden) So...