Take a look at the "best guess" chart linked in my sig. You needto maintain enough chlorine to stay above. The minimum for your CYA level. The pucks alone will probably be enough at first, but as your CYA comes up, you'll probably need to add bleach too. It's fine to use both, just don'tlet them come in direct contact with each other. Also, while using pucks, keep an eye on your pH-- the pucks will tend to drive it down.

Janet