guess I'm another lottery winner....Actually I disagree with the above post and would turn 180 degrees to the complete opposite aspect...everyone that has a fish die of ich WILL post it....anyone that has success will likely not make a thread saying, "I BEAT ICH" people typically post problems looking for help, not successes (hence, this thread)....every tang of mine that has gotten ick, I simply feed well and keep water quality at best....they all have survived....I am not sure what people are doing to kill these fish that get ich....if the fish is eating, it will survive, no lottery here.....ich does not kill fish....stress, poor water quality, a fish purchased that wasn't eating, etc...kills.....I will NEVER QT again...way too much stress and has cost me a lot of fish that were otherwise healthy....maybe, just maybe I would QT if I had a 90 + gallon tank laying around, plus room in the house for it, an accepting wife of yet another tank, and all the time in the world to maintain two tanks.....sounds fun? also, while treating fish with copper that is highly toxic, weakens there immune system, and causes of great deal of stress to me......furthermore... after done with QT, you will find yourself putting the fish back in the tank, after going fishless for six weeks, only to get, yet again, a spec of free swimming ich in a water droplet on a newly purchased CUC ....etc...etc....etc...lol....btw, whoever said letting a fish fight off ich and go through that suffering is just nuts....Copper treatment and qt is WAY more suffering (I'd like to know how many of you that QT actually have the appropriate size tank to qt)....its like chemo...you practically have to kill the fish to kill the parasite....save the fish the stress, feed em well