Feb 18, 2014 #1 Schgred Aquarium Advice Activist Joined Apr 13, 2013 Messages 148 I just happened to see this today. This pic is the best I can get a this was taken from the back of the tank. Is it a sponge? What's up with the hole?
I just happened to see this today. This pic is the best I can get a this was taken from the back of the tank. Is it a sponge? What's up with the hole?
Feb 18, 2014 #2 bribo12 Aquarium Advice Addict Joined Sep 19, 2013 Messages 9,729 Location Maryland Definite sponge
Feb 18, 2014 #3 OP OP Schgred Aquarium Advice Activist Joined Apr 13, 2013 Messages 148 Are sponges like this a good sign? Or just to be expected in a reef tank?
Feb 18, 2014 #4 bribo12 Aquarium Advice Addict Joined Sep 19, 2013 Messages 9,729 Location Maryland Usually means a tank is healthy