I want to share how I beat the bloat in one of my A.Rostratus. Largest dominate male from group of 5 suddenly stop eating had irritating anal area with enlarged genitals. From time to time fish were trying to spit from it mouse, stretch sideways and hiding most of the time in the dark corner of the fish tank. I can observe clear excrement as well. The condition mostly remind me the dreaded bloat.
It's all happen despite me often skipping feeding days during the week and being very selective with what I feed to my fish and how much. But I guess when fish is adult and growing slow down considerably we should cut more on food even comparing to feeding juvenile of the same fish who more active and have more size to attain.
Anyways what I did and it works.
Every second day 50% of water change and mucho Epsom salt. I use cold water, the temp in the tank were dropping from 74 to 68(66) F (I don't remember when but I've heard from people who had success against bloat to use cooler then tank water, not sure if it make any difference, but I did it).
It took about 5 days for Rostratus male to start slowly eating again, first spitting out right back, but then finally start gulping in. Now he is almost ok, almost because he is not as active as he was before, but he does flirt with females, so must definitely feeling better
Hope this helps to others
p.s. I did the same some time ago with Thor Helleri, but it never works and I lost several fish. As a matter of fact nothing I did help T. Helleri.