Here is a slightly different perspective. I bought my pool last summer and the pool store happily sold me $250 worth of Pristine Blue products and told me use the system and shock weekly with %65 Calcium hypochlorite. I had just found this forum a few days before and had not had a chance to read up on all this. And since I am careful kind of person, who researches everything, I came home and carefully read the directions that said to remove all calcium before using Pristine Blue, and not use Cal-hypo shock.
So I got on the internet and found
http://www.pristineblue.com/forum/forum ... .asp?FID=1. Go there and you will notice a couple things- the repeated word "Green" in the posts, the lack of post activity, and the fact that the moderator/company rep pretty much says the same thing over and over again, which is just keep using Pristine Blue per the directions and keep the PH low, and use special shampoos for hair, swimsuits, etc since they are going to turn green.
I came back to this forum and realized that I had spent a whole lot of money for something that was not going to work for me, and that bleach made a lot more sense. I am so glad I did not ever put the Pristine Blue in my pool, and ended up selling the stuff on e-bay, taking a loss, because the pool store would not take the stuff back (said it was "illegal") nor would Pristine Blue respond to my requests to refund the money.
You can do what you want with your pool, but I suggest you do some deeper research. What I found was that the careful user got 3 acceptable years with Pristine Blue (assuming they were extremely careful and willing to have green hair) and then things went downhill fast from there. I am happily enjoying a non-stop 2-3 times a day swim experience with bleach and Borates (and a little dry acid occasionally because we have high pH in our area)- no algae, no cloudiness, no ridiculously expensive chemicals, and no green hair.
Just a little personal experience.