Sustainable populations could be tough (but not impossible) on that small a pond. However you decide to go (BG or HBG), give feeding a try - you my find it a real kick. I was never planning on feeding my fish until my wife got me a 50 lbs bag of Purina Game Fish Chow for my birthday two years ago (last year she had to get me a bag every other week). I really enjoy feeding the fish and seeing them several times a week. It's extra time you get to see them and learn about them on top of fishing time. Plus, it helps out growing that "occasional fish dinner."