Totally Lost

[JohnT]

What level of CYA is too high? Is it the high end of Ben's CYA chart?
Thanks for all the help
R

That's the $64,000 question. I creep up until the chlorine hangs around all day. I'm around 20 right now, but I have a 2 week vacation coming up, so I'll be using the feeder with trichlor pucks while I'm gone. If I was adding CYA, I wouldn't shoot for anything over 30 or 40. Some folks claim that anything over 10 is bad, but I don't know the chemistry well enough to make an educated comment on that. I've just found that at 30 I can put bleach in at night and still have 1.5 or 2ppm the next evening when I test before adding more. Pool is clear, kids are happy.

[faithfulfrank]

As just said, that is the $64,000 question.
I believe it is generally thought that 30-40 ppm is fine.
There are those here who keep it higher. Way higher.

If you do, you just have to know that the higher your CYA is, the higher your Free chlorine needs to be to do the job, because more chlorine is held in reserve.

Watermom posted a sticky with a chart that will help. I would not freak if your CYA is high, just adjust accordingly. It does go down eventually as water gets splashed out, etc, backwashing, and as rain, etc, replaces it.

Frank D.