Closing chemistry recommendation

[FormerBromineUser]

Last I saw was that your CYA was around 40 but were thinking about raising it. Did you? The number on the far RIGHT of the chart are only for mustard algae; extreme cases.

[amillionpets]

Last I saw was that your CYA was around 40 but were thinking about raising it. Did you? The number on the far RIGHT of the chart are only for mustard algae; extreme cases.

My CYA did raise, but it wasn't necessarily intentional. I began using Dichlor from Sam's in lieu of bleach. My CYA kept raising. I went back to bleach once it reached 70. Didn't want it to get any higher. So it stands at 70 as of today. I had a hard time keeping my pH down this summer. ??? Anyway, it's good at 7.9 now. TA=80. CC=0. Water temp is 45*.

Thanks for letting me know what the high shock level is used for.

[chem geek]

For every 10 ppm Free Chlorine (FC) added by Dichlor, it also increases the Cyanuric Acid (CYA) by 9 ppm.

[FormerBromineUser]

Kinda makes you wonder why more people don't use dichlor to raise CYA instead of the slow-dissolving sock treatment!

[Watermom]

Kinda makes you wonder why more people don't use dichlor to raise CYA instead of the slow-dissolving sock treatment!

One advantage of using the straight CYA instead of dichlor is that is easier to know right off the bat the dose needed to get to a desired CYA level.

[JimK]

One advantage of using the straight CYA instead of dichlor is that is easier to know right off the bat the dose needed to get to a desired CYA level.

+1

I'm one of those who prefer to use straight CYA.

[FormerBromineUser]

I have never used it. This was my first year even having CYA and I used dichlor. It was very easy. Straight CYA just sounds like a pain... Squeezing a dangling sock, waiting around a week to verify results. Hmmm.