Ich is one of the "ailments" that I've never really considered as a problem disease...... I've had 100% success every time by just merely raising the temperature to 31/2 degrees for 3 days,.... Then gradually reducing it again to the standard 26/7 degrees, and everything is gone... gone.... gone!...... No additives or medicines, Nothing!... But, that is my experience and my opinion..... I know it is controversial and a lot of people do not agree with this, but I've had 100% success for over almost 40 years. (I wish I can find a treatment for dropsy)