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Originally Posted by Xringer
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The farmer in the video is not lying a bit. His "eden" system is a proven winner in my experience. I have DIY that exact system and it worked well indoors and out. Just a few goldfish will provide enough plant nutrients for whatever you can fit in the grow bowl. All of the materials for one of these systems can be bought new for under 50 bucks. Hydroton costs more than river rock or pea gravel but is much lighter.
His larger systems look rather non-durable to me. The grow beds can be had at a local grow store, sunleaves brand is lighter duty than botanicare. The reservoir can be made of ibc containers like this thread chronicles. Or you can use an easy-set pool found at a garage sale for cheap. They sometimes come with a pump and other useful stuff like fittings and hoses and...stuff.
Any way you go, it is worth the lost effort of pulling weeds and Roto-tilling. Not to mention fertilizer.