How much CYA in pucks


Well-known member
May 9, 2007
El Paso, Texas
I was reading on here the other day and Chemgeek had posted a post telling how much CYA and clorine was in a 6,7,and 8 oz Puck of Trichlor, but can't find it now :cry: I need to raise my CYA from 30 to 70 (SWG install) for a 13000 gal IG, and I have a bucket of Trichlor tablets in the garage, need to know how many pucks to throw in the skimmer



TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
Silver Spring, MD
It takes 125 oz of trichlor to raise CYA by 40 in 13,000 gallons. Don't add it all at once, as it will also raise FC by 66 and lower the PH dramatically.

You can use my Pool Calculator to figure out things like this. Play with the Effects of adding chemicals section towards the bottom.