Perhaps the issue is misuse of carbon (i.e., leaving spent carbon in the system)? Not to deviate from the topic, but anyone else notice they stated "Thirty-five Ocean Surgeonfish, (Acanthurus bahianus) were evenly distributed among the three systems at the start of the study." How did they accomplish that - did they chop up 2 fish into pieces???
50g acrylic w/DIY external O/F box, BeanAnimal Overflow, 2X K 1050's & 1 nano on Wavemaker, wavept retro 4X39w T5HO's (2 actinic/2 12K), 2X12" mixed angle moonlights (ebay), Proflex Model 1 sump w/miracle mud, chaeto, Coralife mini 2X6w T5 (10K/Actinic) fixture, Tunze 9006 skimmer, BRS Carbon reactor, 1/10 HP chiller. Powered by a Mag 9.5 Dosing Bionic 2-part. Scripps Water
Story of My Tank: [URL]http://www.sdreefs.com/forums/showthread.php?t=77273[/URL]