What makes you think the problem is Oodinium? Oodinium is one of the deadliest of fish diseases and will, in short order, wipe out your whole fish community quickly.
The treatment for oodinium is copper. As you have a reef, then all fish will need to moved to a separate hospital tank and treated with cooper.
I have heard/read that Revive can be used to treat oodinium in reef, but have no exp. with it.
Give a description of the symptoms and visible appearance of the problem.