This video shows various vertical grow towers I made with PVC, ABS and bamboo materials, all powered by airlift pumps made with simple T connectors. However, the best and simplest design was made with gutter downspout square pipes by hiding vinyl tubing and airlift pumps inside. I believe that this new design is better than the zipgrow tower because it requires slow water flow rate, no need to use any grow media, and easy to add/remove seedlings and to harvest the plants.
I will explain more on my new website https://dripgrowtower.com
