I have a realtively established tank (9 months) and I have never had an outbreak of Ich before. Right now I only see one spot on one of my clown fish (I have 2 false percs and a Royal Gramma). I have also noticed the infected clownfish rubbing against the LR and seeming to favor the side with the spot when hosting in my RBTA. I can't get a usable picture, but based on descriptions of looking like a grain of salt, I think it is ich. If it is ich, would the fact that there is only one spot on only one of my fish affect how I should treat? i.e. Can I do a fresh water dip on the one clown or do all of my fish need to go into a quarantine tank for a month for treatment?