[Back at the end of July I got a reef tank from my friend after he had problems with it and really no time. All he had left were some red mushrooms, green polyps, brain and a large green moonstone. This green moonstone must weight 10-15 lbs, (I have to weight it some time)! Anyway when I was feeding tonight I noticed that some places on the stone had feeders coming out (feeders look kind of like those on a candycane). First time! So happy, had to share with those who might appreciate it ]