@Bonsaiweed, I checked out the O2 Stone system. Simple electrolysis to break the H2O into hydrogen and oxygen. It'd be simple enough to DIY, but what do you do with the excess hydrogen? I grow in a sealed room. The Hindenburg comes to mind. LOL
Yeah, sealed room with an electrolysis of water is a really BAD idea....think boom. The Hindenburg burned, but hydrogen will spontaneously explode with the right concentrations of O2. You would have a literal weed explosion.