There is a Fish Disease Treatment Forum here on RC. You can get experienced and valuable advice from there.
Epsom salts is Magnesium sulfate. Magnesium and sulfates are already in our tanks because they are a normal part of sea water. The Epson salt treatment has been a recommendation for treating freshwater fishes, but does nothing for saltwater fishes. Saltwater fishes are already in epsom salts.
Hyposalinity is a gentle treatment, but it has to be done with a lot of diligent effort:
1) Using a refractometer to control salinity;
2) Using the right salinity to stress the parasite;
3) Controlling pH (low salinity water is not buffered well and pH can shift easily, downward); and
4) Constantly monitoring QT conditions.
This is a good reference:
http://www.petsforum.com/personal/trevor-jones/marineich.html
After being sure you are running the treatment properly, after being sure you are controlling all aspects of the QT, then the bloating can be an intestinal problem, including but not limited to infection or parasitic attack. But, first eliminate all water condition concerns.
If you provide a photo with the tank water tests and detailed info (foods you feed, appearance of excrement, tank size, tank age, etc.) in the Fish Disease Treatment Forum, someone there should be able to give good advice.
:rollface:
