Quick question about CYA in tri-chlor pucks

[Mesamav]

I'm getting a friends pool up and running for him until he is able to move from Oregon.
I filled the pool, got the pumps and filter working and I added enough CYA to get it to about 25 PPM. I want to bump that up a little as the pool is in direct sunlight most of the day here in Arizona but I don't want to go too high. For the short term, I'm just using the pucks but I just put the CYA in there yesterday so it doesn't show up on the tests yet.
I'd like to know how much a single 3" puck will raise the CYA level in a 14k gallon pool?


Thanks.

 

[linen]

Most 3" pucks are about 8 ounces, so 1 would raise the FC 3.9 ppm, raise the cya 2.4 ppm, and lower ph ~0.21 (though ph change will depend on TA and starting ph). I got these numbers from the "effects of adding chemicals" section of the poolcalculator.com.

 

[lightingguy]

Here's a good post with info. If you know the exact weight you can calculate the exact amount.

A 7oz puck will add about 2ppm per puck

how-much-cya-per-10k-gallons-per-tri-chlor-puck-t976.html

 

[linen]

A 7oz puck will add about 2ppm per puck

In a 14K pool a 7 ounce puck will add 3.4 ppm FC, add 2.1 ppm cya, and lower ph ~0.18 (same caveats as before).

 

[Mesamav]

Thanks guys. That helps a lot.