Ive had two tangs yellow and purple in my tank for at least 5 months without a problem. Well now the yellow tang has been really bothering the purple to a point were he hides all day. Im ticked, I tryed to catch the yellow tang but have been un successful, My tank is a 225 reef, any suggestions please or I think the purple will parish, There both very healthy and bright colored,both around 3.5" :cry: