I almost believe that ich is something every reefer must be baptized with. If it is already in your tank and you have inverts or corals you need to strengthen your fishes immunity levels the best you can with food soaked in Selcon and garlic.
I have had my battles with ich and found that reef treatments were often more stressful to the fish then just trying to feed those that were eating.
Others have their opinions and they may be right but in my reef keeping I have found that a consistent environment of well fed fish supplemented with Selcon and garlic have kept ich away.
I have added fish like CBB and a Powder Blue Tang (that looked like swiss cheese after the other tangs got to him) successfully sticking to this recipe. Don't add any fish until the other inhabitants are healthy and fat. Keep up the selcon and garlic for at least a couple of months after any signs of ich and supplement occasionally after that. Small price to pay considering the price of a nice fish.
In the end you can search for hours and I don't know if you will ever find any conclusive peer reviewed research that ever answers the ich question.
My two cents and that is all they are probably worth.
-Joe
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210 Gallon slowly gaining population.
Foxface, Naso, Coral Beauty, 2 Clowns, 2 Chromis, Orange Anthias, and Striped Goby.
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