I did a little searching for information on toxicity of H2S to trout and catfish. Generally channel catfish are a lot more tolerant (33 times more) to H2S compared to trout. Trout will die a lot quicker from hydrogen sulfide poisoning compared to catfish. If the problem was hydrogen sulfide and the trout died and catfish lived the H2S concentration was above 0.007ppm and less than 0.5-0.8 ppm. temperature and pH play rolls in toxicity of H2S to fish and invertebrates.
Last edited by Bill Cody; 10/11/13 07:37 PM.
