This is my 3rd season of owning a pool with a 3 year old liner. I started wondering what was going on when my deep end liner would get lighter and lighter each year. I looked up some info and found this site. I'm sold on BBB and plan to switch. For the last three years I've been watching my CYA go up and I didn't think there was a feasible alternative to pucks. So each year, I would buy my pucks, shock, and algaecide in bulk at Sam's to "save money" all the while wondering when I would need to drain my pool. It turns out Algaecide is a waste of money and shock is bleaching my liner. Screw that.
When I find out how to get the 10 bucks off, I'll be buying my test kit and doing Chemistry the right way.
Thanks for the great resource