Quote Originally Posted by jimk0512 View Post
I know, I could go to the Leslie's store and buy CYA. But I'm still unhappy with them because of the problems I had with my pool several years ago when they were testing my water and selling me chemicals. Haven't been back in their store since.
You can also buy CYA at WalMart--it's in a 2-lb container marked spa balancer, but if you look at the ingredient label isocyanuric acid is the active ingredient.

You can use the trichlor if you want, as long as you keep a VERY close eye on your pH, but keep in mind that it will take a long time to get the CYA up to a point where it does any good if you just use the pucks--you'll use a lot of chlorine unnecessarily because the sun will eat your chlorine up on a daily basis. It really would be better to at least start with a small dose (say 15 ppm) of CYA in a single dose, THEN start using the pucks to raise it from there.

Janet