Is that fresh water or saltwater if salt water put your fish in a empty 10 to 20 gallon tank and no coral or anything just treat them for that now if fresh water do the same thing but i've never had a fresh water problem with ick thank god but anyways my mom has a 150gallon saltwater tank and her fish died from ick becuse she did not have them treated for ick she had no spare tank to put them in so tons died only the strong lived sooo good luck