hey haven't been on in i while. i just moved my 55g into a 90g. 4 weeks ago. ive got great filtration and great lighting. everything good intill now my powder brown tang got ick! ive hade it before in my old tank. that was 6 months ago. my question is none of my other fish have it. i feed my fish garlic and very well! so should i let the tang fight it or should i pull him before my other fish get sick?