i discovered aptasia growing from my live rock and being new to the hobby did numerous searches as to firstly identify what this was and discovered that best course of action was to remove it if possible.although there was plenty of great advice of various solutions i could`nt manage to perform any as i did`nt know where exactly in the rock it was growing from as it was pretty cunning in disappearing without trace..
My solution was to boil a kettle of water and just pour it onto the rock with immediate success the aptasia actually ejected itself out of the rock into the basin ...a quick rinse of the rock in r/o waterand cooled down and placed back into position in the tank and everything is cool just thought i would post incase anyone else has a problem locating the little den where this creature hides.