Read this. http://www.reeftectonics.com/shark_keeping.htm
The "coral banded shark" is most likely a brownbanded bamboo shark. I hate LFS terms. One out of a hundred actually knows what they have. They get about 40 inches in length and grow fast. A 6 inch newly hatched one will be about 18 inches in roughly a year. Very large tank needed and careful selection of tankmates. Sand for substrate and minimal rockwork.