I am sorry to say that I don't have any experience with salt water pools.Youcan check with "Jack's Magic" and see if there is anything different you have to do with salt water pools. I would pm sean from autopilot on this forum, he may be able to tell you if you can use the ascorbic acid - I would imagine that you could if you turn off the system.l I will try to check some things and get back to you.