I completely disagree with Walter Adey and the more I'm not like him the better. He is long on theory and short on success. Him and Karen Loveland came out with a book a long time ago espousing ATS filtration called Dynamic Aquaria: Building Living Ecosystems. Why? Because he invented the algal turf scrubber technique in the 1970's to clean water in the Museum's coral reef exhibit, using fish waste to grow algae. The Smithsonian patented it in 1982. He was the only person who could legally sell the ATS units. Just a little self-interest involved there LOL. However, he needed a better editor.....if I was trying to sell an ATS unit, I don't think I would have included the following sentence in my book. Woo Hoo....I want an ATS!!! (Try to find one of his units now and you're gonna be dissappointed. People had horrible results from using them and no one wanted to buy them anymore). He believed in setting up Mesocosms and used algae as it's basis. Unfortunately, it didn't work at the Smithsonian and they modified their systems by adding carbon filters and protein skimmers and water changes. http://www.sms.si.edu/SMEE/behindthescenes.htm It didn't work at the Barrier Reef Aquarium in Townsville either and they didn't just modify his plan....they abandoned his ideas altogether. http://www.reefhq.org.au/takeatour.html Finally his mesocosm in Biosphere II was yet another failure. While pushing to get government funding, he said this After they got caught cheating and sneaking in supplies, Oxygen, replacement critters for the biosphere and after wasting millions of taxpayer dollars, he said this of his own mesocosm, "It was screwed up". Maybe it should be mentioned that he has nothing to do with the marine exhibits anymore. He is now in charge of Botany and not marine environments.. http://www.nmnh.si.edu/botany/projects/algae/Staff-wa.htm Think about that one for a second. It's a neat thought....build a whole ecosystem in a glass box. However it doesn't work unless it is very simplistic. A coral reef is extremely productive and complex and a whole mesocosm cannot be set up properly. I have met Morgan Lidster and I have toured his fish breeding and coral breeding facilities. There is no way on God's green earth I want my display tank to look like that. Besides, he is doing tons of water changes. Every fish, every coral that gets bagged up is an extremely small waterchange. The discolored water is fine for a growout tank but not for a display tank. BTW....here's my ugly mug with a huge Sarcophyton at Inland Aquatics.