CYA in stabilized granules

[Nick]

Hi chums,

I would like to ask for some help from the chemical gurus on the forum.

Unfortunately I cannot afford a proper testing kit at the moment but I would love to be able to work out what CYA level I have at the. My pool is about 7,000 US Gallons and so far has only been given one kilo of stabilized chlorine granules (bought before I found the site and the BBB advice)

According to the label on the Stabilized chlorine granules bottle it states that it contains Troclosene Sodium, dihydrate. Sodium Dichloisocyanurate, dihydrate EC No. 220-767-7

You could post that info in Klingon and it would make more sense to my limited chemistry comprehension.

So, the Q is, Can anybody help me work out how much potential CYA I have in my pool if I have added one kilo of the above?

I appreciate any assistance

 

[chem geek]

One kilogram (2.2 pounds) of Dichlor (dihydrate) in 7000 gallons will raise the FC by about 21 ppm and the CYA by 19 ppm. In general, for every 10 ppm FC added by Dichlor, it also increases CYA by 9 ppm. You can look at The Pool Calculator to get some of this same information.

Richard

 

[billybrobob]

Does th CYA in DiChlor dissolve faster than granular CYA?

 

[JasonLion]

Does th CYA in DiChlor dissolve faster than granular CYA?

Yes, dichlor dissolves reasonably quickly and the CYA becomes active immediately. You should see the final CYA level within an hour of adding dichlor.

Dichlor isn't usually the ideal way to add CYA because you don't always want the FC and it is very acidic.

 

[Nick]

Guys,

I am very grateful for your replies and the 10:9 ppm ratio is really helpful - thanks to you all.