A look at the construction of my Earthan Beds. Previously these beds were Wicking Beds with sand in the bottom, but now I want to be able to let aquaponic water flow freely through the beds so I've replaced the sand with rocks. The soil I place back into the Earthan Beds is a mix of sand, compost, pumice, and garden soil, amended with Azomite. Pumice is not required, but it provides plenty of surface area for bacteria while making the soil light and airy.
When I first started to use my wicking beds I noticed the smell of anaerobic bacteria. By allowing some water to flow out of the overflow tube each day I was able to prevent this anaerobic condition. When I removed the sand and soil from the wicking beds I found no sign of anaerobic bacteria.
By letting the water flow through the Earthan Beds I will create a good environment for nitrification and prevent anaerobic conditions. The water from the Bioponic System will also provide nitrates and other elements for good plant growth.
The first video shows how I constructed the Earthan Beds
This video starts out with a tour of my fall garden.
Click the hot spot to skip ahead to the nearly finished wicking beds.