The reason BSF aren't catching on is because they're icky. The scientists involved in studying BSF refer to it as "the yuck factor". Seriously.
I have to admit to a slight yuck factor. It's there, but nothing I can't overcome. If one can gut a fish, he can certainly feed fly larvae.
If my pond wasn't 5 miles away, I would try it. My motives for growing BSF are a bit different. I would grow them as chum and reliable live bait. My table scraps are very unreliable. Sometimes 10 pounds a week, sometimes 1 pound. So I probably wouldn't be able to produce enough larvae to supplement feeding.
In the mean time, I'm growing meal worms. They are very easy, tidy, and care-free creatures to grow. The larva, pupa, beetles, and their food smell just like raisin bran. Haven't tried them as bait yet, but I will as soon as the 2nd generation eggs hatch. The larva are a bit long for a no. 8 hook, but the stubby pupae are a perfect size. I think I can raise ~2000 for the cost of a bag of Wal-Mart raisin bran, and store them for months.
