Question re: orange bubble tip anenome

[newreefer_59]

Bought a very nice bubble tip anenome (pinkish in colour with orange tips) a few months ago that was small (I thought) as it easily would fit in my hand. I feed it a piece of raw shrimp weekly and seems to be very healthy and is hosting the one True Percula Clownfish I have. My question is on some days it grows very large (about a foot tall and 8" or so across) and seems to be hazardous to the health of any nearby SPS/LPS coral. It does appear firmly anchored on some live rock. Is this as large as these will get or do I have to re-arrange and aquascape my 150 gallon tank to further accomodate?

Tank is 5" X 2' X 2'.