$10 in pvc and a new pump ($32), I changed my avast reactor to a recirculating biopellet reactor. I added pellets to the reactor, after the mods where made. That's why there are some at the top. The one at the bottom been in the reactor for 4 weeks now. If I was to buid another, I wuld go with the wider reactor from avast and change the valve to a gate valve ,like a fellow reef suggested from my local club. Also it will be fed from my return pump,when I change my return pump
https://www.youtube.com/watch?v=atWl-Gx_xeU&feature=youtube_gdata_player
https://www.youtube.com/watch?v=atWl-Gx_xeU&feature=youtube_gdata_player