It's worth mentioning again that the bios tend to have 1 or 2 out of every ten that are duds (they will exchange them for free however), and the rest have mostly imperfect spray patterns when compared to eachother. However, fret not-they still grow the best roots with their droplet size, spray pattern, and excellent throw. Every person using the red cloudtops and other similar nozzles have all had the same issue of the roots making a large ball that eventually chokes itself off, whereas the bios seem to make longer flowing roots that go to the bottom of the chamber and then climb up the walls, filling the chambers in a nice even spread out manner.