Assorted Mushroom Frag PackHow to Care for Mushrooms written by Dave Burr Mushrooms are a classic beginner coral and are easy to keep. These beauties will stand out in any reef aquarium. Placement: Mount the rock or frag plug that the Mushrooms are attached to by using IC gel glue, or putty, in the bottom half of the aquarium where they can reproduce and expand their colonies over the rock. If you do not want them growing on your your main rock structure try creating a mushroom