Hi Andrew. Welcome to permies.
I for one can say that aquaponics will play a large part in my future land-based food systems, even if we're just talking about an interconnected trout
pond ecosystem integrated into my food systems. I suppose I would term that
aquaculture rather than aquaponics. Also, I think you will feel that the latter will get less traction, except in certain specific circumstances, than the former.
In terms of grassroots appeal, I find that anything that has large non-reclaimed material or
energy costs is going to suffer. Likewise, anything that can be done on a budget that, once in place, requires little to no maintenance and costs little to nothing to operate will be very popular.
I think one thing to keep in mind is that for small-scale operators, there will be much more fertilizer produced than there will be fish. In other words, the fish are happy little bug and scrap eaters that produce fertilizer and occasionally become a tasty treat. The amount of effluent produced by an amount of fish that would provide steady sustenance would require far more than a simple integrated hydroponic system. I'm thinking separate sedimentation barrels with filter feeders, and maybe a methane digester, which would be a waste, but what else do you do with too much poo? For the sake of clarity, let me specify that I am thinking about small-scale production with limited space, as in an urban or suburban residence. Anything with pasture could obviously make great use of excess fish
water.
I like the example of
Sepp Holzer's work on the Krameterhof as integrated aquaculture, where the ponds retain water, slowly replenish the aquifer, and support a natural
pond system that produces fish, fertilizer, and other associated aquatic animal forage.
What kind of work have you done? What are you currently working on, and how do you feel aquaponics fits within
permaculture?
-CK
A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
-Robert A. Heinlein