Aqua's a funny thing- it actually gets easier as it gets bigger. Little twitches are more easily absorbed.

A rig big enough to be stable actually looks, runs, and smells a lot like a sewage treatment plant.

Recirc aqua is also a differant ball of fish than extracting tank water to use as a nutrient in a soil-based system.

It'll work ( and be a signifigant food source in the near future), but I'd say that home aquaponics is about as practical as home tissue culture.