[forestal]

nice color on the ricordea,
i thought i might give a couple other attachment ideas, as the rubber band looks on snug side which may hurt the coral... try a push pin (long one) minimal damage to coral and often very easy to insert a good bit into live rock, once attached you can easily remove,
also plastic toothpick to skewer (not my favorite for mushrooms) and rubberband or glue the toothpick
lastly bridal veil to cover the shroom until attached, and the veil can be pinned, rubberbanded or glued down