Re: CYA in a Bromine Pool
Originally Posted by
CarlD
Nope. A table like the "Best Guess Table" only a "SWCG Best Guess Table".
For an outdoor pool with a SWG:
CYA 80-100 ppm (use SWG manufacturer's max number)
FC 3-5 ppm
Shock, if and when needed to 20 ppm with bleach
These numbers work.
I would also add:
TA 60-80 ppm
pH 7.6 to 7.8
CH 350 to 400 ppm (for plaster and fiberglass)
borates 50 ppm
These parameters will give the best pH stability, which will vary with each pool because of such variations as water features, assuming cured plaster.
No need for a chart since keeping the CYA at 80 or 100 ppm is important for pH stability since it translates into less cell on time.
One set of parameters is all you need based on the CYA of 80 or 100.
Last edited by waterbear; 07-20-2010 at 10:12 PM.
Retired pool store and commercial pool maintenance guy.
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