This was an experiment I conducted a few years back. I took a 5 gallon bucket andn lid and made a single Hydro set up, just to see how it compared to dirt. I used Canna Bio-Flores,Budawel and Guanoi Kalong for nutes.In the bottom of the bucket I put two aqurium air disces and hooked them up to a pump and oxigenated the nuterent salution and it did the 35% - 35% thing just like I thought. As a matter of fact the plant ended up out growing the room and I aventualy had to pull the top to one side so it didnt get burned by the light. TOAST