Re: CYA in a sock
Originally Posted by
Poconos
Polyvue,
A couple months ago I tried dissolving a couple cups of CYA granules in a gallon jug. Nope. Some did, most didn't. Kept pouring off the concentrated liquid into the skimmer and refilling and eventually after a couple weeks the solid was almost dissolved. Certainly didn't dissolve in 10 minutes. The granules are fine enough they will easily, or quickly, get past the skimmer and pump baskets. Once they make it to the filter how do you know how long they take to dissolve? I don't use the stuff personally. I smash up pucks.
Al
Well, my CYA is a bit low so I guess it's time I do an experiment. It's been my belief for some time that when CYA is added to my pool it can be detected in a fraction of the time suggested by those here and elsewhere... in hours, not days or weeks. But I'm conservative when adding chems and haven't tried to increase CYA 20 or 30 ppm all at once; perhaps I've been misled due to the imprecision of the test. The turbidity test doesn't exactly lend itself to the task.
And, even if the experiment supports my thinking (that all or nearly all of the CYA will be evident in testing within a few hours of application) I don't know how transferable this finding would be. Everyone's (IG) pool plumbing is a bit different, filter capacity, flow rates and head vary, etc.
So, I'll try to resolve this during the week, starting tomorrow night, by raising CYA 20 PPM. Got lots of melanine stored up. What the heck!
16'x29' free-form 14K gal IG gunite pool; SWCG & sodium hypochlorite 8.25%; Hayward SwimClear C4025 cartridge filter; Hayward SP3202VSP TriStar Variable Speed Pool Pump; custom test kit based on Taylor K-2006C; city; PF:8.6
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