oh wow I see you two have gotten into quite the discussion haha.. well the pump I use is a dual outlet cheap wal mart air pump which supposedly runs 1.4 lpm... so if theres 60 mins in an hour, and each outlet runs 1.4 liters per minute that would be 84 lph and I am running 2 air stones from each outlet in the same bucket.. which I would assume would what 168 lph?? My math could be wrong but that's what I'm coming up with. I know most people say that 30lph is easily enough.. If I'm right I do believe I'm putting quite a bit of oxygen in the water. I haven't read if too much is a problem or not but I would assume not.. as far as a root stimulator, I will be running Voodoo juice but I haven't received any yet but as soon as I get it I will be starting it with the sensi grow ph perfect along with some B52 ..