So, I’m playing around with a gravity fed Aquaponics bed. Most ebb and flow systems I’ve seen use either a bell siphon, or an electric/mechanical timer. This idea is a little different, it uses a Shishi-odoshi (“scaredeer”) or sōzu to start a siphon which drains a 5 gallon bucket of water into a grow bed. The timer is governed by the flow of water into the scaredeer (the 2 liter bottle).
Some background:
I have a fish pond, a rain barrel and a gravity fed water timer. The rain barrel is 10 foot off the ground and a solar powered pump replenishes the barrel with pond water while the sun is out (like a water tower). The barrel, in turn, drains into my water timer overnight and on super cloudy days.
The aim of the timer is to be able to slow down the water flow as much as needed and not worry about stalling the siphon or fully draining rain barrel.
Here’s what I got so far:
