Do yourself a favor: never accept "good" as a measure from a pool store. Have them give you a number. "good" doesn't mean anything without the value it describes.

Be careful your powdered chlorine doesn't raise your CYA too high. If it's Di-Chlor it will raise it too high before your conversion is complete. That's why bleach/LC is better. If it's cal-hypo, it will raise your calcium level very high very quickly AND can make the water cloudy. Again, that's why bleach/LC is better.