It is fine to use Clorox as long as it is plain, unscented. I think what Carl was trying to say was it is more expensive than generic bleach. Nothing wrong with using Clorox. As far as the cya - you can put it directly in the skimmer. That is what I always do. Then, it will take about a week to dissolve in the skimmer, so don't retest for it or add more for at least a week. Also, don't backwash during that time or you'll just be throwing it out. The stocking option - just take an old knee hi or whatever and put cya in it and then tie it off someplace in your pool and let it dissolve. Some people (I think?) place the stocking in the skimmer basket to dissolve. Again, I just dump it in the skimmer. One thing that apparently Carl and I do differently -- he says not to turn off your pump for a week. I don't worry about that. While my cya is dissolving, I just keep my pump on its regular run schedule and have never had any problems. Hope this helps.