hey man u commented on one of my pics askin about the tubes those have bubble stones hooked to the end in the water and there is 3 small pumps pusin the air into them to make bubbles that make oxygen for the roots. go check out my grow iam allmost done got about 3 weeks left till harvest. my setup looks alot dif now tell me what u think http://www.rollitup.org/aerogardeners/170475-aerogarden-45.html