CYA present in sodium dichlor?

[poolgal13]

I always thought that sodium dichloro-s-triazinetrione had CYA in it already. Yet I have a granular form that says "sodium dichloro-s-triazinetrone-dyhydrate" that recommends adding their stabilizer/conditioner (aka CYA) to it to prolong its effectiveness.

My idea was to use that form and bleach to achieve my chlorine level and thus the bleach would be made more stable by the CYA present in the sodium dichlor.

Anybody know the answer? I really need easily soluble forms because the trichlor was bleaching my small pool's liner where the filter output was.

[tphaggerty]

DiChlor (normally) does have CYA. I use it in my spa and the CYA levels rise to the point where I have to drain & refill every 2 to 3 months (CYA was over 400 before my last refill).

It would help if you would post the brand, container size and exact wording on the container regarding adding stabilizer. It would be interesting to follow up.

[mwsmith2]

dichlor and trichlor both have CYA in them You can't have either without CYA.

Michael

[poolgal13]

Thanks for the quick reply. The brand is Kem Tek, which I had purchased at Lowe's last year but didn't use very often. It's 99% dichlor......

Sounds like "adding their stabilizer" was a way to buy one more of their products.

[bdavis]

Green label like this one?

http://www.kem-tek.com/labels/poollabels/all-in-one.pdf

"The use of KEM TEKTM ALL-IN-ONE CHLORINATING GRANULES also requires the one time use of KEM TEKTM STABILIZER CONDITIONER as described in the directions below under Start Up. This two-compo-nent system results in a longer-lasting chlorine residual and reduced chlorine consumption. Both products are completely soluble."

I did see this:
1) FOR CONTROL OF BACTERIA AND ALGAE (OUTDOORS) IN SPAS: Before bathing test water pH, chlorine residual and alkalinity using a suitable test kit. Adjust chlorine residual to 3.0 ppm. After bathing superchlorinate to 5.0 ppm (1 level tablespoon per 500 gallons of water). Use a chlorine stabilizer espe-cially for outdoors, to proplong chlorine residual.

but then, also this:

"Draining and cleaning of spa is recommended whenever the water becomes difficult to manage or chlorine stabilizer goes over 100 ppm as measured with a suitable cyanuric acid test kit."

I don't see CYA listed on there, or being a stabillized chlorine. Hmmm?

Cheers

[mwsmith2]

It's in there, really!

DiChlor is:

SYNONYMS: Sodium Dichloroisocyanurate, Dihydrate; Sodium Dichloro-s- Triazinetrione, Dihydrate
CHEMICAL FAMILY: Chlorinated Isocyanurates


TriChlor is:

CHEMICAL NAMES & SYNONYMS: Trichloroisocyanuric acid; Trichloro-s-triazinetrione
CHEMICAL FAMILY: Chlorinated Isocyanurates

There's no way to have dichlor or trichlor without CYA.

Michael

[bdavis]

Yep, looks like its in the same family.

MSDS shows: Chloroisocyanurates

In this picture, it also shows stabilized on the label.


Cheers