The last feeder had a limited amount. This one is designed for pellets around 2 mm in size or smaller and can feed whatever amount you want for a pretty long time. It's designed to fit a Vex motor or servo. I'm not sure what the exact production spec is but if someone knows please post.Print then program. If the pellets are having trouble falling, a sketch pattern was the solution for me, a short full power jerk opposite and then a slow opposite turn farther to fill the hopper.There are 2 designs for the inside wheel. I recommend the one-notch one for less amount but more accurate feeding and the multi-notch one for those with larger fish that eat steak for breakfast.