This guy is great. Purely open-source ecology here, recycling common materials, achievable without power tools, suggestions for methods. It’s so simple it is criminal. I see a small problem if we are going to adapt an aquaponic system to be based in these barrels, and that is that the reservoir is too large, and there could be a problem with spillage. With such a large reservoir we are adding unnecessary weight and the need to pump more water which means more energy to move the water and more water use. However it is a novel idea. It can be aptly used as a method of raised bed agriculture to redevelop an urban space with contaminated soils and can be adapted to incorporate vertical growth by stacking the barrels. Furthermore it is neat. Everything is contained in a barrel with a predetermined size can make planning a garden much easier.