I've got my robot and used it a couple of times. The instructions were not very helpful. The Active30 came with the filter "box" installed, with 4 filters in place(ultra fine filters?), made of a fine white screen. Separately, 4 pleated filters came in a bag. Should I be using the 4 pleated filters that came in the separate bag, along with the fine screen filters, or just the fine screen? The debris that collects on the bottom now is small in size, with a worm here or there. Margaret didn't recommend the rough pre filter upgrade, due to reduced water flow, and also because she didn't have any in stock.