I have had tremendous success in treating and preventing ich with two treatments. First, Megan, there is some truth to increased temp in decreasing ich. But, ich is just like a cold virus in humans. It is always there on the fish, and will rear its' ugly head in any stressful situation such as bad water quality, aggressive tank mates, etc. As soon as I see any signs of ich, I soak my fishes food (preferably bloodworms) in several cloves of coarsely chopped garlic. Then, every meal I fish the worms out of the garlic and feed to my fish. They love it. I also, at first sign, put a product called "melafix" in my tank daily for at least 5 days. This is an all natural oil from tea trees, and is safe for fish and inverts. If all else fails, I use copper in a qt, but despite many outbreaks I have yet to resort to it. Copper is highly toxic to fishes livers and compromises immune systems. So, at least for me, frequent small water changes, Melafix, garlic food, and CoralVital have worked great for me in mt 30 gal and 90 gal tanks that have been going since Feb. Good luck, Megan, and have a great time. What a pleasure this hobby is!