Stephen[/QUOTE]

Stephen,
chlorine 4.0 perfect .. all #'s are great.
Hmmmm.


I am keeping it aroudn 4ppm despite's ben's chart but I have 0 algae and my water is crystal clear. I just want to know if my CYA is going to hurt me in the long run.
If the chart says 8-15ppm, why do you think 4ppm is better? Stephen, if you did a plus 50% drain and refill twice, your original CYA would have been 400+. Is that possible. Perhaps your CYA is not as high as you think? I'd retest.