ive had my copperbanded butterfly for 2 weeks now, and ive had trouble getting him to eat, althou he picks the LR all day....well, today i bought a sailfin tang, who is now perminantly attached to the butterflys fins!! and they eat my mysis together now, and both pick at the purple sheet i put in aswell. its the best thing to see. just thought id share, is this common?