When I am caring for one of the ~50 SWCG pool's we've sold, I tie the CYA to the salt at a ratio of 1:100 to get a cya level 30-40. The Goldline/ Hayward models we use indicate when more salt is required and add an appropriate amount of cya when we add the salt. If anyone is interested in reading my rant on the cya levels for salt go to the "CHINA SHOP" (off topic and general intrest area) and look for the post I started. I'll try to link it in a minute.
http://www.poolforum.com/pf2/showthread.php?t=1409


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