catappa (Almond) leaves boiled in water, leave the water too cool (dechlorinate water!), and add it to the tank, then put the leaves in the tank. you wont get ick again these leaves have antibacterial action for fish and stop the parasites returning, also they help the fish with healing , the only downside is your water will have a slight tea colour, but this makes the water look more natural for these fish. i have always used this method and ick has never returned to my fish over the 10 years of having fish, also use this method in my ponds 
