Tropical Fish Keeping - Aquarium fish care and resources

Tropical Fish Keeping - Aquarium fish care and resources (http://www.tropicalfishkeeping.com/forum.php)
-   Beginner Saltwater Aquariums (http://www.tropicalfishkeeping.com/beginner-saltwater-aquariums/)
-   -   what is this? (http://www.tropicalfishkeeping.com/beginner-saltwater-aquariums/what-4239/)

Rogergolf66 03-14-2007 07:21 PM

what is this?
 
Does anybody know what these are. They look like an grey color like small little tree shaped. They are growing on the rock in some places.

Good? or bad?

http://www.fishforum.com/userpix/647...tank_017_2.jpg

Rogergolf66 03-14-2007 07:22 PM

by the way I have a lawn mower blennie in the take he dosn't seem to be eating it.

Melissa 03-14-2007 08:08 PM

im not sure exactly what it is, but we have some on our rocks. well its on the backside of or rocks. doesnt seem to be hurting anything.

caferacermike 03-14-2007 09:02 PM

That's a good sign. I forget the actual name but it's a sign of a healthy established tank.

Rogergolf66 03-14-2007 10:02 PM

Thanks


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