Twelve Gallon Airlift Vortex Bioreactor; No longer sold - please copy

This is an airlift vortex bioreactor (compost tea brewer) which I designed. It is no longer feasible financially to sell an affordable version so sales are discontinued on this particular model. I'm leaving this video up to help people building their own. In this video you can see some of the microbes grown and another illustrates the perfect vortex created using only one airlift, rather than the 4 employed by other machines. Note that there are some brewers on the market using airlifts on the diagonal. In my estimation this is mathematically inefficient but it looks cool eh?