[DrHank]

You are already overloaded with tangs. Probably no problem yet because the fish are young. As they get older and larger they get more aggressive.

Back in the 80's I was inexperienced and did put an Achilles together with a Powder Blue. I thought that having 3 tangs in a 75 gallon would be OK. I made sure that the Achilles was smaller and added the Powder Blue last. It was a disaster. The Achilles tore into the Powder Blue as soon as the fish was released. Hurt him so bad that even though I got him out I couldn't save him.

About 2 days later, the Achilles started to come down with ick (big time). To make a long story short I lost most of my fish within 2 weeks.

Personally, I think you've got too many tangs already. I wouldn't recommend adding the Powder Blue (or any other Tang for that matter). Keep a close eye on those that you currently have and be aware that although they are fine together now, that may not be the case as they mature. Good Luck.