It doesn't, I was using it for a reference relative to the size of the reactor. I don't remember what they recommended or how much the measurement was, so I just took a stab at how much I thought was in there. When I started back up, I just put very little because at that point I was throwing their recommendation out the window. I doubled it after a few weeks, and I'll up it a little more next time too. Just easing things on.