To make a long story short: introduced the ICH in to the 65g reef tank with a frag 3 weeks ago, all fish but perks in the anemone got it and are in a bad way. Removed all fish in to the cuper. What shall I do now? The (surviving) fish will be OK in a couple of weeks. Question is how long is it going to take for the now fishless tank to become ICH-free?