Hi,
Having been in the aquarium business for a great part of my life, I have successfully treated so many outbreaks of Ich that I no longer consider it much more than a nuisance.Raise the temp. to as high as the fish can tollerate. I would shoot for 90 degrees F. The parasite will leave the fish and swim free in about 24 hours. At this poin you must treat with a good copper or silver based remedy( I am not a fan of MG however). In order to kill the free swimming parasite you must retreat at least three times at three day intervals. slowly bring the temp. dowm to normal range.If available to you, “Aqurisol” might be a good choice for treatment.