I was wondering is it is possible to have a ich free tank. I have never quarantined any of my fish until now. A few months ago I added a blue throat trigger to my system and he must have caused stress in the tank or brought in ich. I unfortunately lost the trigger, my achilles tang and one clownfish. All the other fish had ich as well but I was able to quickly set up a quarantine tank and save all the others. So if I quarantine all the fish with copper and leave the DT empty for 6-8 weeks is it still possible for my fish to get ich again when I put them back in the main tank. I have heard that ich is always in a system but I disagree with that.What do you guys think? Have any of you been successful at maintaining a tank without ever seeing ich?