CYA in a sock

[waterbear]

Putting CYA in a sock is a recommendation that we've been making on this forum for years, even before the other forum that you're alluding to ever existed. We do not recommend it as the sole way to add CYA; however, most of the people we have this discussion with are also having filter issues, and that's why the sock is being recommended.

EXACTLY! It's from this forum the use of a sock was taken (we had QUITE a discussion about it over there!) and then made into the ONLY correct way to do it. I am just saying that, unless you ARE having filter problems, it is entirely unnecessary!

[sturev]

I think I read a post about liquid CYA being available now...? To me, that's the easiest I recall something about it being more expensive though...

[waterbear]

I think I read a post about liquid CYA being available now...? To me, that's the easiest I recall something about it being more expensive though...

QUITE a bit more expensive in fact.
1 gallon Liquid Conditioner raises 10000 gallons about 35 ppm and costs close to $30 online.
2.75 lbs CYA raises 10000 gallons about 35 ppm, 4 lbs costs between abut $10 and $20 online.

do the math

[sturev]

Wow, that is pricey... Does it still take a week or so to start working/showing? If it starts right away, it might save some money in bleach...

[waterbear]

Wow, that is pricey... Does it still take a week or so to start working/showing? If it starts right away, it might save some money in bleach...

It is supposed to work my faster BUT if you filter 24/7 for a day or two after adding CYA it starts showing up pretty quick, at least enough to protect the chlorine.

[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

[waterbear]

Polyvue,
AOnce they make it to the filter how do you know how long they take to dissolve?
Al

By putting in a known amount that will cause a certain ppm rise and testing the water. I have found that it usually takes anywhere from 48 to 72 hours of constant circulation for my CYA to reach the levels for which I dosed.

[polyvue]

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!