Ok, I'm trying to figure out how to do all this. This was supposed to be my husbands job We have a new pool. About 2 weeks old. I'm going to try the BBB method. I got my test kit. I added some CYA in a stocking in the skimmer box yesterday. It was all gone today. Do I have to wait 5 days to test it, or would I get an accurate result now. The pool is in full sun, and the chlorine is being used up rapidly, so hopefully that improves once I get a good CYA level.