Gary Donaldson

tl;dr; Sand is a superior growing medium for aquaponics compared to gravel or clay pebbles due to its better mechanical filtration, vastly greater surface area… Read More »Sand versus Gravel as Biofilter Media

tl;dr; Industrial farming is unsustainable and threatens global food security. We need a food production system that’s water-efficient, organic, low-energy, affordable, accessible, resilient, adaptable, scalable,… Read More »The Ultimate Food Production System?

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… Read More »The iAVs Promise…the Detail

tl;dr; Basic flood and drain aquaponics is inefficient. Convert your system to iAVs in 5 easy steps: replace gravel with sand, add a permeable sock,… Read More »Turning a Pig’s Ear into a Silk Purse

tl;dr; iAVs is a low-cost, low-tech food production system ideal for developing nations. It uses a sand-filled grow bed as a biofilter, draining into a… Read More »Building the iAVs in Developing Nations

tl;dr; iAVs has verifiable data showing it’s more productive and resource-efficient than the UVI raft system. iAVs excels in fruit production and offers significant profit… Read More »Dare to Compare