For some reason I couldn't start a new post in the start here section so I'll just reply to my original post. Hope that's OK.

Before I found this forum, I got a 50lb tub of 3" chlorinating tablets and a box of 1lb bag of shock from Costco. I hate to let this go to waste so my question is, how much CYA will a 3" tablet add? What's the safest way to store this stuff?