What Organicbuds has done in his latest barrel design is try to copy my 50 gallon microbulator. This is not one of the designs I've posted for people to build, although I'm not opposed to people attempting this for their own use. This is the first lay out (well similar) which I did for my US patent so if someone started to sell them I may sue them.
Ive seen this stuff at Holland and Barret(Health shop kinda thing) was going to ask if it was any good but forgot.. Cheers Von for the reminder lol
If both systems are built correctly, then I would go with the air lift system. The air lift creates pressure and infuses oxygen into the H2o. However, cleaning a bubbler system is easier, considering you don't have PVC to take apart and clean. If you go air lift you may consider buying a paint strainer bag from home depot and place your casting in that. That way nothing sits on the bottom of the brewer.
FYI-Micro-pore Air Diffuser bubbles are .25 micron [they claim]. More surface area=more dissolved O2. -granger
Thanks granger, I've got my 2nd tea brewing right now and I'm still running the airlift... But my tea still isn't full of foam....is a good layer of foam on top a necessary indicator of a good brew?