Meir Lazar got me thinking...pee-ponics philosophy... When he asked how to add P or K to his pee-ponic system(s) for his flowering fruiting plants, I gave him a "standard" answer coming from a organic hydro perspective...Rock of Phosphate, Bone meal blahblahblah...but suppose you were a vegan? Or, the idea of using an unsustainable post peak mineral did not appeal to you? OR, you really were tryi…