"We had a vacation feeder in while we were gone for two days, it was a 5 day feeder, and when we got home we just left it in. The next morning we had new babies, and I think because the other fish's pallets were satisfied, they hardly went after the young fry! Now, two months later, we have about 30 plattys and about 20 guppies that made it past the one week stage (where we so often loose them) and now, we are expecting another batch from a new momma...... It is so exciting watching them mature and get their colors etc! I attribute it to the feeder being in the tank when they were young. Also- we did add another feeder after the first was gone. They really last a lot longer than what the package says..... Although, Petco hasn't had much for stock on the shelves lately. Maybe others are getting to know what it is worth!"