I just got a powder brown tang about 2 weeks ago and when i put him in the tank he got ich which every fish does because of stress.It went away then came back.It was real bad yesterday.So bad that we thought he was going to die.He is looking a little better now,but i was talking to my fish guy and he said that there is some stuff that you can add to prevent ich and it is reff safe.I was just wondering if it is true.Because i dont want to go thought what i went though when i added that kick ich crap.Everything else is doing real good and we have not had aby problems with the tank.I got one more thing to ask.I have a coral in my tank and i dont know what it is but it is real big.It has been looking strang latley.It does not look sick are anything.What do the corals look like when thay split.Thats that only thing i can thank that it is doing.Here is a link to the coral. http://seeker.theuncle.com/charlie/pics_188