Yet another thing to identify

krfish

New Member
Okay,
These green things just appeared in my tank. They probably hitchhiked from a new small rock that I put in, but I am not sure. Anyone know what they are? They originally looked like some kind of algae, but there are tube looking things sticking out...

 

krfish

New Member
Do I need to get rid of it? I accidentally let hair algae get in my tank when it was new about 2 years ago and it took forever to get ride of. But if this little sponge (which is in a couple of spots) is okay - I will leave it.
 
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