from what i've read into there not reef safe, those and angels and butterflys, i've looked at angels as well because there some beautiful ones out there, you can go with tangs but go with 1 that is very hardy, i know that powder blues get ick easy, some people have better luck then me, i also have a uv sterlizer in my tank and still have outbreaks of it. try doing a search on tangs to see what other people say.. hope this helps