From my experience, I want the larger feeder because when we take vacation and we are gone for 9 to 14 days the larger feeder can be on its last leg so to speak when I get back. I have even run out of feed but it has not happened but once or twice when feeding, lets say 4 feeding times at 8 to 12 seconds per time. It depends
on how long u might be gone from the pond
Tracy
