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cyanuric acid ?

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CV3720:
I've read a couple posts that mention cyanuric acid (CYA). The test strips I purchased for my new tub are "6-in-1", but don't check that. Is it an issue, and at what level?

bud16415:
They may call it stabilizer on the 6in1 strips.

CYA slows down the action of the chlorine. A little is good too much is bad.

It is added to the chlorine you are using dichlor as it is used in pools and sunlight removes it.
In a tub it doesn't see much sunlight so the CYA builds.

I use dichlor until it reaches 50ppm and then switch to household bleach. When the CYA drops to 30ppm i switch back. 

Tman122:
Some people who use dichlor never check it and don't care. It makes the chlorine less effective (add more)

A.O.:

--- Quote from: bud16415 on January 28, 2021, 06:54:37 pm ---They may call it stabilizer on the 6in1 strips.

CYA slows down the action of the chlorine. A little is good too much is bad.

It is added to the chlorine you are using dichlor as it is used in pools and sunlight removes it.
In a tub it doesn't see much sunlight so the CYA builds.

I use dichlor until it reaches 50ppm and then switch to household bleach. When the CYA drops to 30ppm i switch back.

--- End quote ---

The CYA will drop back down?? I thought that once it was there it was there for good..

Tman122:
I should of been more clear. The PH will go down (because of the higher acidity) So they adjust PH and change water every 3-4 months.

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