May 21, 2016 #1 kevindo123 Active Member View Badges Joined Nov 9, 2013 Messages 316 Reaction score 62 Rating - 0% 0 0 0 I saw this in someone's reef tank. It's on 99% of the live rock.
May 23, 2016 #2 OP OP kevindo123 Active Member View Badges Joined Nov 9, 2013 Messages 316 Reaction score 62 Rating - 0% 0 0 0 bump. Just curious what this is.
