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, basically I'm stuck with dichlor.
So the question is, how much CYA is too much? 80 ppm? 100?
I have googled around but can't find a good answer. My water is only a month old and my CYA is already ~60ppm.
I have no problem changing the water often, but it would be nice to know what CYA level is considered too much.
And it is strange that the dealers/manufacturers doesn't teach this to their customers...