I would encourage everyone to learn about Aquaponics. Simple definition/explanation: Fish waste/water is used to water/feed plants similarly to hydroponics, but it is much simpler and extremely cheap; the plants effectively filter and add soluble oxygen to the water for the fish.
I knew I would regret that burrito. But this tiny ad has never caused regrets:
Permaculture Voices 1, 2 and 3 - all 117 hours of video!
