^^^^^^^I said to feed once in awhile because I was under the impression that the discus wasn't eating. Also, the fish is an adult so no need to powerfeed it like you would a juvi. Also I wouldnt give any medication. Hex is an infection of the intestinal tract. I dont know why you have diagnosed your fish with that. Who knows if the fish actually has hith or if he is just confusing all of the sensory pits for it. Discus have many pits on their faces that are supposed to be there.
I am feeding him about 3 times per day, performing daily water changes of 30 percent or more. I belive he has hex because I observed white stringy poo that looked exactly as I have seen it in pics/explanations, etc. I am going to take some pics tonight and send them. He has a black spot on his forehead, along with pits that I am hoping are normal. There are no good LFS here. I need some food to supplement the frozen brine. Today, even though he ate, he spit the brine out, which is consistent with hex. I have already medicated the tank, with a mild med, once> I was set to do the second dose tonight, after the water change. I'll send the pics ASAP. I truly didn't think hex would impact my other fish, and I didn't think he had a fungus or ick. Thanks for your help...will send soon.
HITH can be cured without medication. Remove carbon and do what you are doing, the daily water changes and feeding lots. Make sure you are feeding different foods though, brine shrimp, blood worms, mysis shrimp, glass worms and pellets if he takes them. See what different foods he will take. HITH is normally caused by lack of nutrients or poor water quality. Some people even believe Carbon is linked to HITH. If you start to see improvement without medication then keep up until it is gone. If it gets worse, then medicate. Its surprising what you can cure with clean water and a healthy diet.