Do you have a picture? It wasn't discus, but I had a bout of epistylis (spots are "fuzzy") that started out looking a lot like ich. It started on rummynose and ended up hitting cardinals the worst. Two weeks + three days of kanamycin (kanaplex) mixed with focus into food did the trick. It was pretty nasty. I was raising temps and hitting them with Ich-X twice a day (after 50% water changes) and it didn't make a dent.
I don't know if it started as "stress ich" or ich and then epistylis was secondary infection or what.
It was one scoop of Kanaplex, one scoop Focus, and one tablespoon of food. Then a capful of Garlic Guard. The fish loved it, so that was a plus. If I needed to feed it to my discus I would thaw a cube of beef heart and make it into a paste and then refreeze it, I think.
notich.jpg