Sand Selection Guide

Given its central role in the success of iAVs,sand is dear to our hearts and is something we’ll be talking about – a lot. We thought that the following ‘Pocket Guide‘ might be helpful for those wanting to create a highly efficient biofilter....

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:...

The Ultimate Food Production System?

If you could wave a magic wand and invent the most productive, resilient and sustainable food production system in the world what would it look like? Before you do that, however, let’s think about why building the ‘ultimate’ food production might be a worthwhile goal?...

Proposed iAVs Website Changes

This post is largely a loose contract with myself.  Of course, you’re welcome to read it…for as much as you might have interest in what happens with iAVs and to this site.   I started a review of this site many months ago…and, while it is coherent in...

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...

Aquaponics’ Biggest Mistake

Most people who are interested in aquaponics know that Missouri farmers Tom and Paula Speraneo popularized what is commonly termed flood and drain aquaponics. For the uninitiated, flood and drain aquaponics in its simplest guise comprises a fish tank and one or more...

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...

Sizing an iAVs.

When it comes to sizing an iAVs, the first thing you have to know is how much fruit and vegetables you are going to need.  The next thing to know is the quantity of fruit and vegetables you can grow in a given space. Working out how much food you need is a simple...

Why iAVs lapsed into Obscurity.

Other than its inventor, I probably spend more time than anyone else wondering why iAVs never  took off – in the same way that aquaponics did – back in the mid 2000’s. My recent re-reading of Steve Diver’s ATTRA aquaponics document revealed some...

iAVs Layout Options

In its simplest iteration, iAVs has its fish tank(s) located in-ground. The pump, located in the fish tank, moves water up to the sand bed.  The water then percolates down through the sand and drains back into the fish tank. Note:  These diagrams are not to scale.  ...

Dare to Compare

If there’s one thing that aquaponics is short on, it’s verifiable data…but not so…with iAVs. Notwithstanding serial demonstrations of conceptspanning 20(?) years, there isn’t even much available ‘data’ on the UVI raft system....