4 months ago i bought a piece from the lfs, not even sure which type altho i think lobata due to brown polyps.after the fact, i found it was not a wise buy, however i placed it on the sand at the bottom of my 75 with 6x 54 t-5s. heres the deal, it's definately growing with lots of new tiny polyps, but today while cleaning inside the tank i caused the polyps to retract for a while. this is where my question comes from. i noticed the coral itself has turned from an off white color to a light green color. it doesn't appear to be algea of any type but the color of the skeliton. is this normal or is the poop about to hit the fan? thanks bob