Hey there everyone. The dreaded parasite "ich" somehow managed to show itself in the 180.....I have theories but thats not what we are here to read about! Lets get to the real question, HOW TO KILL Crytocaryon irritans (Marine White Spot Disease) or commonly know as ich. Right off the bat I want to say I understand QT is the best way to avoid this disease, With that being said not many of us use or maintain a QT system because its for one reason or another not feasible. After talking to a friend of mine that is a marine fish veterinarian they offer some great advice and how to handle the issue. First off removing all the fish from the reef is a MUST if you want to get rid of the parasite fully. Copper treatment is the best method of treatment for fish, I am not saying you can't get the job done using something that is reef safe I just want to stress that it may only put a bandage on the problem. I would like to make this thread as knowledgable as I can because I have the sources and would like to help out everyone else so we all can avoid this from happening to a well established reef with fish that might as well be children to some of us. The following posts will go through a number of steps on what ich really is and how it lives its life along with how I will be going about treating my fish and progress along the way. I will be using commercially available products so that everyone can replicate this process. I have access to other chemicals and treatments that are laboratory grade and hard to get since I am at a fish health lab but I want to help you as hobbyists as best I can.