Ich in a reef.

[marcingo]

So i called the lfs I bought the fish from and they tell me they always qt their fish and that none of their clowns have ich. He told me the ich could have come in on my corals. My tank has been fish free for 3 months so wouldnt all ich have died by then? If not and I qt my fish and medicate wont the ich still be present in my main tank as it has (supposedly) for the 3 months its been running. How would I get rid of the ich from my main tank if its on my corals?