Right now I have it so my return pump, a mag 9.5, turns off about 5 min before the automatic feeder dumps some food in, then it turns back on about 10 min after. This happens once a day. I'm strongly suspecting one of my fish needs food more than once per day. My concern is the pump. Is it going to wear on it too much to have it turn off and on twice a day? How do others feed? If I put food in with the return on, the food all goes pretty much strait for the overflow, it takes a bit for it to get wet enough to sink.