I agree with Mebbid. I've gotten rid of ich a few times with this method. IMO, it's the safest. No chemicals, no salt for fish/inverts. that can't handle it. Most fish easily tolerate 86 degrees, and it has gotten rid of the ich completely for me every time. Just be sure to keep the temp up for the FULL two weeks, and/or for several days after you no longer see spots. If you end the treatment early, it could very well come back.