You are moving too fast, slow down a bit. I operate a 300 gallon reef that is 18 years old. It contains several angel fish, a coral beauty, a flame and a black tail angel. They are all over 5 years old. The coral beauty is the only one you can trust with coral. The flame picks every now and then, the black tail is relentless. I am lucky to have so much coral that none of the picking seems to be doing any long term damage, but I would not have bought the black tail had I known. Some flames pick, some don't. Mine all nip at each other, but again, the tank is big enough for there to be no damage done. None of the yellow angels, like lemon peels are safe for coral.