Thought I could speed thing up with a small test kit BUT I soon learned I had to go back to my 2006 to be certain of anything. So I went down to buy some new reagents and yes ...only had 2006 for a month but just testing my brains out. I have a fiberglass pool so calcium hardness isn't such a big deal but what heck might as well. Only takes 10 minutes and I'm going to test daily for awhile until I am sure