I'm guessing that your volume is around 10K. 4 lbs of stabilzer in a 10K pool should add about 50ppm of stabilizer. It takes up to a week to totally dissolve and give you an accurate reading so don't test it for awhile. You really don't want your stabilizer (cya) level to be any higher than 50, so I would not recommend using those pucks. They are Trichlor pucks and they add more stabilizer which you don't need. I would suggest just using bleach as your source of chlorine for this pool.