I have been using a Sweeney since 2008 in a pond I manage for my boss.
You can check it out on youtube. my video is called Catfish farm.

If you want your fish to grow fast, multiple feedings per day will get the job done. Feeding once a day is not going to cut it.

I can grow out Channel cat fingerlings to eating size ( the size Southern folk prefer that is 10 to 12 inches long, from March to Sept.

The key is in feeding your fish 5 percent of their body weight per day.
Spread out over the course of the day.
During the warm periods I will feed them on a schedule of 8am 11am 2am 5am. That's the whole point of having a programmable feeder.
Hope this helps someone.