I've never had rhino farts, and I've just used Wyeast nutrient and Montrachet yeast.
I should have said that when I used FERMAX with Montrachet, it cut down considerably on the H2S production. Still got less or none with EC-1118. I think I should have added more DAP. Bag said 1/2-3/4 gram (1/2 TSP per 5 gal), which seemed low to me as I've seen others using a full teaspoon per 5 gal.
The Fermax worked great as directed. I think I am going to try to find another bottle of that.