That little frag will eventually overtake that rock and then another. lol
My gsp frag was the same as yours size wise and within a year it has taken over a 6x6 rock and has it completely covered. I did glue that frag onto the rock I wanted it on though so you might try that.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.