Hello I'm new to the forum. I have a swg pool that measures 26x46. In ground vinyl siding. I have been shocking for a week and a half and have been testing in the morning and late evening. My FC is at 20 my Cc is at 0.5. Cya is at 40. I haven't added the salt yet or turned on my salt generator yet because of the algae problem. My question is how do I get the cya level to the recommended for swg pools. Which is 70. The pool is very clear now considering what it looked like. Thank you all