I took your suggestion Dave and added to a sock and hung it. How long will it take until I start to see some results? I don't want to waste another CYA test. I think I read somewhere it will take about a wk before it actually shows up on the test? I added one lb. and it's probably half way dissolved at this point. Been chlorinating all day and just added enough to bring it up to shock for the night. I will be testing in about an hour. My pH was good and the FC was actually at 5 before I added more a bit ago. CC was at 0.5. (10ml tests) Going to make sure I am on top of this all day tomorrow with keeping the numbers at shock level.

I'm thinking of just sticking with bleach this year. I can't see buying 3 bags of salt for 3-4 more weeks of swimming.