We usually advise people to wait to add CYA until the water is cleared up and chlorine is stable. Also, be careful about using the Pool Calculator. It is set up to try and solve problems with one big dose of whatever ingredient you are working on instead of smaller additions, testing, adding more if needed, etc.

A different calculator that we like better is called the bleach calculator although it has more than just a bleach calc. If you click in the upper left hand corner, it will give you other calcs as well.

http://www.poolforum.com/pf2/showthr...18-bleach-calc