Increasing CYA

[Jujube]

Did a resurface of the pool, so the pool has 0 (zero) CYA.

Should we add CYA? Or do we just use shock until the CYA level start coming up?

Thanks!

[Watermom]

You can do it either way. You can use stabilized shock (dichlor) powder until you get the CYA where you want it or you can add CYA separately and then chlorinate with a non-stabilized form of chlorine such as bleach or calhypo if your pool needs calcium.

Welcome to the Pool Forum!

[PoolDoc]

As Mom said, you can do either.

But if you have a good source of undiluted dichlor (= at least 60% available chlorine), it's often cheaper to use dichlor, since you get almost as much CYA from each dose of dichlor, as you do chlorine. Sams Club has PoolBrand dichlor for excellent prices, both as a 50# bucket and as a 24# box of 'shock'. (Last time I checked, Costco sold only 'diluted' dichlor.) The KemTek brand, sometimes sold by Home Depot, distributes undiluted dichlor, but you need to watch the label. Walmart sells only diluted dichlor.

If you don't have a local source, or if local prices are high, Amazon can be a good choice (and we get 5%, if you use the link here):

Kem-Tek Pool Concentrated Chlorinating Granules