So i made the mistake of not quarantining a couple new fish and my display is now infested with ich. I set up a QT tank today after losing my tang. I ordered a copper treatment from amazon and it will be here in the morning. Right now there is 2 clown and the foxface. The foxface is doing really poorly. Laying on the bottom of the tank, barely moving. Would it help him to drop him in some freshwater for a few minutes? If he can make it through treatment he should be fine but i am worried about him. Is there anything i can do?