Mar 6, 2015 #1 jman9331 Active Member View Badges Joined Jan 18, 2015 Messages 458 Reaction score 33 Location Suffolk Va Rating - 0% 0 0 0 Trying to figure out what this is growing on the rocks.
Mar 6, 2015 #2 KorD Valuable Member View Badges My Tank Thread Joined Feb 11, 2014 Messages 1,365 Reaction score 928 Location Northern Texas Rating - 0% 0 0 0 looks like a sponge
Mar 6, 2015 #3 OP OP jman9331 Active Member View Badges Joined Jan 18, 2015 Messages 458 Reaction score 33 Location Suffolk Va Rating - 0% 0 0 0 it isn't anything to worry about?
