Couldn't find it right now, but you could check out plantchicago.com
They combine aquaponics with beer brewing and kambucha tea.
It is a pretty good model and I have seen many similar projects as they tend to compliment eachother. I have a ton of academic papers on my kindle that talk about alternative fish feed, winded corn based commercial feed has been shown to reduce the nutritional value of tilapia. Beer sludge among other things is on that list. (What is left over from brewing)