I haven't done anymore videos on it recently but I probably should
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http://thehotpepper.com/topic/47975-video-update-on-my-aquaponics-setup/
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I've been doing it for a few years now, all I can say is that it's tricky with flowering plants/perennials, my biggest issue is kind of a dumb one, I'm using carp which are very oily and dirty, they produce a lot of nitrates...this is great news if you have large areas for massive grow beds but when you have a small area to use it's not so good. Leafy greens do amazing though. Without the space for an extensive network of grow beds I would have to suggest to anyone to use a low-waste tropical or subtropical fish instead of a temperate one. Just keep in mind that the most common one people gravitate towards--tilapia--is tropical and will die if they aren't kept warm during the winter.
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If you have a 120gal tank you could probably have a nice AP setup with a school of tetras or some other small type of tropical fish. You can get a ton of tetras in a tank that size.