I dont Liz. But I suspect cryptobia is far more common in Discus than we would like to believe.. I just keep remembering all those massive doses of metronidazole people were using to treat "Hex".. I mean dosing multiple times a day and thousands of mgs at a time.. I will bet anything that alot of those "stubborn" cases of Hexamita was because it wasnt Hexamita.. it seems likely it was cryptobia not drug resistant Hexamita.
Al