Eric, Glad all is well there!

To answer your question on the HITH. When you see a solitary eruptionthat looks like a pimple like that its probably a localized bacterial infection. If theres multiple pits and erosions, that can still be bacterial but its also possible theres other causes and only one of these causes are parasites like hexamita. It may be going against the grain when I say this but I don't believe that parasites like hexamita cause HITH in discus, or a least its rare. Theres been a link thats been made between HITH and hexamita that has been very beneficial to various medicines that are supposed to cure HITH by getting rid of hexamita.

Al