I posted this in another thread and it seems relevant to this one.. So:
I'm in the same spot. Got a blue hippo tang from a friend who said that the fish was quarantined, no ich. Well I can't totally blame him, but for some reason or another my blue hippo now has ich along with my green clown goby. I'll let you guys know what happens along the way, but I'm currently running the 28 watt aquamedic uv through an eheim 2213. I'm using the lowest level eheim to make sure its effective against parasites. I am feeding all my fish frozen mysis and brine that has been soaked in garlic and an omega3/amino/vitamin c solution. I am picking up 2 cleaner shrimp and will start adding a medication to the food in the form of Metronidazole (Fish Zole - per the reefkeeping article). I will also do 20% water changes every day (parameters currently 0 ammonia, 0 nitrite, 10 nitrate, 79 degress, salinity of 1.025, calcium 520, ph 10 degrees). As long as the fish appear healthy, I will continue to do the above for 1 month and track my results. If I notice that the fish show signs of additional stress or some secondary infection, I will tear down the tank to catch everything and then use hyposalinity treatment. Cross your fingers guys, this will be an interesting month.