Assorted Encrusting Coral Frag PackHow to Care for Encrusting Coral Frags: (written by Dave Burr) The corals in our assorted encrusting frag pack are easy to keep and grow well in most reef aquariums. They are a great choice for adding a splash of color to lower flow, lower light areas of your reef aquarium. Placement: Mount the encrusting corals using IC gel glue, or putty, on an exposed rock or ledge in the lower two thirds of the aquarium where they will receive moderate currents