I had a horrible case of ick when my new fish arrived my, and to boot gave all my tank mates icy. All I did was raise the temp over 82 and bam, within a week gone. No salt, no meds, nothing and all my fish did well. I have apple snails, o don’t want to harm them. 30 fish had icy, 30 fish went through it well and are alive t0day!