Right now your CYA level is at the upper limit of what is generally considered acceptable around here, when you add stabilizer or stabilized chlorine usually in the form of (pellets, pucks, sticks, etc.) it raises both the chlorine and the CYA level, in time as water is removed through splash out, backwashing, etc, and replaced through either rain or tap water your CYA level will fall, when it gets to the low end of the acceptable range (40 ish) you can go back to adding the pucks to slowly bring it up. In time you will find a balance of how much chlorine you need to add by liquid, and how much stabilized you can add through the pucks to maintain a constant level. You generally do not want to add both at the same time as they can cross react (ie. eventually when you need to raise your CYA use pucks on week and liquid the next, etc.). There is also another type of dry chlorine compound that raises both chlorine and your calcium hardness level, you can use it if you want to if your Calcium hardness is below about 250-300, calcium hardness is not generally needed at all in vinyl pools, only in plaster and concrete ones, as too low of calcium will cause the water to suck it out of the concrete.
Ike
