awesome that answers alot. but im still confused on something, i hope u guys can help with this. but how does the water from inside the bucket get delivered to the halo, or the surface, with just an AIR pump?

i want to build one just like the DWC sticky (http://boards.cannabis.com/grow-log/...-dwc-grow.html). but i dont know how the water will get delivered to the top with an air pump and not a water pump thanks guys.
enquadrider16 Reviewed by enquadrider16 on . quick question i have searched alot but i cannot find what dwc stands for. im just guessing but i think it is a bubbler system where the water splashes up to the roots then the roots eventually hit the water and soak up the o2 and nutes from there is that correct? also in this system do you ever have to hand water, or do you ever have to pour water onto the top surface of the growing medium? sorry for the newb question but i couldn't find the deffinition anywhere. you can delete this after but i Rating: 5