If you're familiar with how a flood drain Aquaponics system with a bell siphon works, you can probably watch this video and construct it with your own ideas. It can easily be modified to accommodate more grow beds. You can customize it off the base principle. (Water pumps up from fish-tank to grow beds. Autosiphons and gravity drain and fill grow beds. The cycle repeats.)
There's a 3 min video run down of the building process HERE.
There are more detailed instructions and supply list here on my "Instructables.com" post HERE.
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