I would throw back the bigger ones if your goal is quality bass. Harvest the ones that are stunted. This is indicated by low RW's and something like 80% of your bass or greater in a small size calss such as 10-12 inches. This will indicate the bass that need to be harvested. Although bass overharvest if possioble, I would think you still need to keep on taking them out, it is all about your goals for the pond.