Hello Kevin Crowley!
Here are some references that may help you.
Weitkamp, D.E. & Katz, M. (1980). A review of dissolved gas
supersaturation literature. Trans. Am. Fish. Soc., 109:659-702.
Meade, J.W. (1985). Allowable ammonia for fish culture. Prog. Fish Cult.,
Vol. 47, No. 3.
Kutty, M.N. (1978). Ammonia quotient in sockeye salmon (Oncorhyncus
nerka).J. Fish Res. Board. Can., 35:1003-1005.
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Tor Haug (torh at nfh.uit.no)
Norwegian College of Fisheries Science
University of Tromsoe
Norway