Hi Layla,
My good friend Liaquat has given you very accurate and well intended advice. It’s great that you live right next to one of the most beautiful coral reefs in the world and I’m sure Acroporids are abundant over there, but I don’t think it’s cool to go break off a few heads of Acropora every other day from the reefs to satisfy your fishes needs in your tank. In the wild these fish will not over feed on a single coral and kill it, but rather move over the reef pecking here and there causing hardly any damage at all, where as in an aquarium they are forced to peck the coral or corals to death. It would be great if you informed the people at your pet store as well, they probably had no idea.
Just a comment on your tank if I may…
Your lighting intensity doesn’t seam to be very high, I may be wrong and you have a couple of high powered light about to come on….
The reason I say this is that you have a couple of very high light demanding specimens in your tank. Ie. Clams and Anemones. Not sure if your were aware? Cool