I have a 350 gallon reef tank that has been up and running for about 6 months now. I currently have 3 yellow tangs, 1 blue tang, and 1 blonde naso tang inhabiting it and I'm looking for 1 more tang. I like Powder Blue tangs, Purple tangs, Blue Caribbean tangs, and Orange Shoulder tangs. I'm aware of some of the ich and aggression issues associated with PB tangs and that it's probably not a great idea to add the purple now that the yellows have established their territories and pecking order... Can anyone share their experiences with these fish? I haven't seen a lot of testimonials about the Orange Shoulder or Caribbean tangs, so any info specific to them would be much appreciated!