A belt feeder is a mini conveyor belt that you put feed on and it turns on and off based on time you set, then dumps feed in based on the on time. You do have to measure the food out quite precisely, and make adjustments as you go.
A screw or auger feeder is a much better and precise animal. Fill whatever container it has with food and the auger will dispense small amounts of food based on how you have it set up.
You can eliminate possible over feeding and waste with a screw feeder, where as with a belt feeder, it will be as clumsy and forgetful as we all are
The light attracts the fry to congregate into a specific area. Because they are really stupid at this stage, they are unaware of dangers, and the light attracts. If you try do this in your pond, chances are that you may be ringing the dinner bell for predators.
Isolation and control will be your best bet for feed training. Trying to feed train by hand could become quite exhaustive on your part.
