What do you mean by pucks/sticks? Are you talking about the 3" chlorine tablets I put in the chlorinator?

Where do I buy CYA to add to the pool? I'm sorry I have so many questions, but I have so much to learn in order to do this right.

I just don't understand how 2-3 gallons of chlorox is going to kill the algae and clear my pool when 15 gallons didn't do the job. Can you help me with this?