OK, I just got my CYA test today and ran it twice. I got about 25 both times which is what I kinda expected. I have the chlorine test already and can take TA and pH at work. CYA was the only other thing I really needed to test for but I thought I could get this from the pool store every so often so I didn't buy it. I had taken 2 different samples in to the store about 2 weeks apart and both times they got 100 and it was 2 different employees. I guess my question is am I doing my test right or can they be that far off? Do I keep going until the black dot is completely gone? Should I be in sunlight to look at the test or is normal inside lighting OK?
Thanks for the help,