I think it was the size of the fish and potentially the bacterial load that accelerated the process....
Do you think probiotics had any factor in such a quick degradation of the oxygen?
Detroit's oldest large LED tank! Est'd Jan 2005, went LED June 2009. 6' wide 130g reef, Sunbrite T10 LED tubes (3xGen 3 and 1xGen 1), mostly SPS, but chalices, other LPS, and a few softies too. http://pjr-reef.blogspot.com/