How many seconds should I run my fish feeder? The fish are your best source for answering that question. Start with two or three seconds. Record how long it takes them to consume the offering. If there is no food on the surface after five minutes, move the time to four or maybe five seconds. Just make sure there are no pellets on the surface when fish are full and stop eating. That should occur in 10 to 15 minutes. Appetites will increase as water temperature rises.