I have been successful for the last 5 years running Algae Turf Scrubber as the main filtration ( no skimmer ). Nitrates are undectable. Phosphates are undectable ( if I add KNO3 to temperarily increase nitrates over the night cycle ). A phenomenon though has happened in the last 3+ months. Algae scrubber growth is down significantly yet nitrates nor phosphates are still undectable. I have no idea why but it doesn't really matter just so long as nutrients aren't accumulating. It's time to shake things up and see, can chaeto reactor replace my Algae Scrubber and still maintain nutrients levels ? After seeing the BRStv episodes on chaeto I wondered if on larger scale can this replace turf scrubber. I purchased over July 4th online sales the largest Media Reactor I could find. The Avast MR16 which is 9" in diemeter and approx. 18" tall. I will be adding 12v LED string that I already have ( I planned to test on the Algae Scrubber but never did ). So Stay tuned. Media reactor has not yet arrived but I will document my findings here.