Peppers ..... mine won't sprout :?

[urbanfarmer]

the most difficult pepper to sprout and raise is the Bhut Jolokia, it requires temperatures close to 90 to sprout. habaneros like warmer weather particularly like the carribian reds or red siennas want warmth to germinate. there is a lot of grafting of plants, don't know the fertility of their seeds.

I have several of these sprouted and grown to a decent size, but they refuse to fruit. Yes, they flower, but then I get no fruits. I haven't figured it out. I have some in soil and most in my aquaponic setup. The ones in the aquaponic setup are side-by-side with other "regular" peppers. These other peppers flower and produce fruit plentifully. I'm still trying to figure it out!