Ich
 

I Have A Yellowtang Thats Got A Touch Of Ich I Heard About Using Garlic Oil Does Anyone Know How Much And Where Do I Get The Oil From My Tank Is 77g

You would mean garlic extract. Its available at most healthfood stores.

There are other ways of treating ich as well. Hypo salinity (I think, double check on that one), turning up the heat a few degrees, etc. Take a look at wet web media, or reefkeeping magazine for instructions and better explanations.