Sand versus Gravel as Biofilter Media

  This article provides more detail around the proposition that sand is a much better ‘aquaponic’ growing media than gravel……or expanded clay pebbles. GRAVEL >      VS  SAND >   (click image to enlarge) Sand is the better medium because of its:...

Growing Your Own iAVs

Aspiring iAVs operators are often confused about how to approach their first build. I always recommend that newcomers to the method start with something small…a fish tank of 500 to 1000 litres and a sand biofilter/grow bed of 1000 – 2000-litres…which...

Turning a Sow’s Ear into a Silk Purse

In “Aquaponics’ Biggest Mistake” we spoke about how the basic flood and drain system came into being – how it started off as a mistake and then became the subject of wilful ignorance – and then how it became the dominant aquaponics model...

Sand Bed Lifespan and Maintenance

One of the questions that crops up from time to time is…..”Do sand beds need cleaning?” No form of so-called ‘aquaponics’ is a perpetual motion machine.  Every ‘system’ type requires periodic maintenance – and iAVs is no...

The iAVs Promise…the Detail

The iAVs promise reads….. iAVs has the capacity to produce fish and fresh vegetables sufficient to provide a family with 200 kg of fish and 1,400 kg of vegetables (fruit) per year in a footprint equal to an automobile parking space. * *Assumes a sub-tropical or...