I always wanted one and now that I have a 180gal. tank I'm trying to add one. The problem is that my QT is a 20gal. long and my first attempt failed with a 5" tang, died from complications due to stress. Want to get a 2.5" to 3" size one but my LFS claims they do not do well that small. Has anyone started with a Naso of this size and were you successful.