Cloudy Water out of nowhere

[JimK]

I also use granular CYA. I just add it slowly in the skimmer and let the pump run continuously for 24hrs or so. Based on my own testing this seems sufficient time to dissolve the CYA.

I've read some posts saying it can take a week to dissolve CYA, but I have to wonder where that info comes from as that's never been the case in my experience.

[Watermom]

You kinda want to err on the side of caution ---- making the window longer than it probably needs to be before retesting so that you don't: 1)waste CYA testing reagent
2)think your CYA is all dissolved, decide it is too low and add more and then end up with too much.

It is easy to add more CYA but hard to get rid of it if you have it too high.

[JimK]

You kinda want to err on the side of caution ---- making the window longer than it probably needs to be before retesting so that you don't: 1)waste CYA testing reagent
2)think your CYA is all dissolved, decide it is too low and add more and then end up with too much.

It is easy to add more CYA but hard to get rid of it if you have it too high.

Good point.

[BigDave]

Should I buy some of that granular stabilizer (HTH from Wal Mart) or a small (very small) bucket of dichlor tabs to get it up? From what I have read, that stabilizer stuff can be a pain to dissolve. I will NOT buy another gallon of liquid stabilizer from Leslie's. While it was nice to instantly get it dissolved, not worth the cost. I have to move it 20ppm in 10,000 gallons.

Tabs are usually trichlor and, like granular CYA, are slow to dissolve.

Dichlor is usually granular and dissolves quickly, 1lb of pure dichlor will raise your pool's FC by about 6.5 and CYA by about 6. If you use it for daily chlorination, three or four pounds will get your CYA in range. Accept nothing less than 99% dichlor (55% available chlorine) There's lots of junk on the market some of which adds copper.