I put 100 in late this last summer. I will be feeding as you already mentioned. I will have a nice fountain, I know a fountain is by far not normally a good choice if its purpose is aeration, but it was given to me as a gift and in a smaller pond I would think it would have to do at least some good. I will be trying to catch many of the ones I put in to get the numbers down. I put 100 to ensure some survive predation from a few LMB that are in there. The CC I put in were 6 to 8 inches so hopefully that was big enough. the LMB are mostly small and are being fished out as heavily as possible. This is my first pond and I am only about 5 months into it so any other advice is appreciated. As far as restocking after you began catching from the original 50, did you simply restock approx. what you harvested each year. or did you add a spawning area for the CC and remove enough to keep them from overpopulating?