Black Sponge
 

My tank is growing black sponge. Wondering how common it is.
http://i635.photobucket.com/albums/u...s/mushroom.jpg
It can bee seen at the bottom of this rock and between the mushrooms on the top.

OMG i love your mushroom rock. Never heard of black sponge though.

Are you able to get a better pic of that? Interesting.

I've got some black sponge (along with a whole bunch of other sponges I've never been able to ID). Mine kind of grows like a mat over the rocks. How about you?

i posted something somewhere sometime ago on a rock with black sponge and people told me not to worry
actually i think seahorsefanatic was the one that said hes seen it a few times and its not harmful.

I've had some of the same black sponge before. Coincidentally it was also on a purple mushroom rock.

black sponge was the only thing I ever noticed my Blue Linckia eating.

They are quite common. I have black, yellow, orenga, white and pink sponges growing on my liverock.

They usualy start to grow after the aquarium as matured a bit and if there are enough nutriment in the water. Zeovit Sponge Power will help them grow.

Here is a better picture of it.

http://i635.photobucket.com/albums/u...s/bSponge1.jpg

If anyone in the Vancouver wants some it has grown on to some shells in the substrate.

http://i635.photobucket.com/albums/u...s/bSponge2.jpg

Oh yeah, with this post I crack 300.

Joe