adding a school of fish to a reef tank

3 weeks ago we added a school of 10 captive bred Hawaiian Yellow Tangs from Biota to our 6’ 228g system! They are amazing. They range in size from 1.5” to 2.5” with 3 of them being bullied. At night they all sleep in the same area and tolerate eachother, during the day they act like a bunch of...