I'm sure that I have missed this along the way. I know that Nate uses a specific fiber media in his towers that was purchased from a supply company that only sells in bulk. I have also noticed that other people have setup towers. What media is everyone else using? I have investigated pads for air conditioners, swamp coolers, green scrubby sponges, floor buffers, Coir mats, etc. Looking for the solution that works for others, fits well in the 6" x 6" fence post, is inexpensive, easy to get and safe for plants and fish. Any help would be appreciated.