I think that you are going to find that a pump that size in 9 liters of solution is goinging to raise the temps in the bucket way too high. Also, smaller volumes of solution make it harder to control the pH and PPMs. Contrary to the maker of the video, I do not find smaller volumes of nutrients to be an advantage. I really see no reason for the drip if you plan on using an airstone (which you should do regardless) and doing DWC . You can simply put the level of the solution slightly higher than the bottom of the net pot and it will accomplish the same thing--enable the roots to grow into the solution. This seems like a lot of work and money with no real advantage. What do you see as the advantage of this over a simpley DWC?