You can safely add the bleach immediately after adding the pH decreaser. You will have to put Chlorine in the pool daily until you have stabilizer in it. When you add your stabilizer, put it in the skimmer, but don't backwash or retest (for the CYA) for at least a week, since it takes a long time to dissolve. You can swim immediately after adding the CYA, as long as your chlorine and pH are in line.

Janet