I have been doing a little reading through this forum and it seems to me that the CYA never goes away like chlorine does. If that is true, why do they put it in with the shock and chlorine tablets? Also, what is the ideal amount of CYA?

I am supposed to have a pool party on Saturday and I want the water to be swimmable. I am not that worried about the water being clear, but I don't want to have so much chlorine in the water that they can't swim. Is this going to be possible and still be working on clearing up the water?