His book is quite informative and he goes through a lot of details about how to set up his own system using a bubbler (used to oxygenate the roots) that he teaches you how to make and where to get the supplies. He goes through the whole process which I can't describe since I haven't read the whole book yet. I am still trying to finish getting all the supplies to set the system up for growing micro greens. Problem is that he does not reveal his source for screens and wants you to email him to get that source, I tried but that email address of his is no longer valid. Does anyone know? Is he still alive? I don't see him on Facebook, where he claims to be.