One of my fish died yesterday, so I took a close look at the other fish and noticed that my fish seem to be suffering from ich. I bought some Quick Cure and and put that in the tank, but I've also read in various places that raising the temperature of the aquarium can help fix ich. I've never adjusted the temperature of my tank (it's about 76 degrees F), so I'm nervous about making it too hot for my fish. I have marble angels, tetras, barbs, and a pleco. Any advice on what a safe temperature raise would be, if one at all? Thanks in advance.