Encrusting Battle

[Ppoulin99]

Hello all, I am trying to identify a possible encrusting Algae/Bacteria. It is brown/black and competing with my coralline algae. It is encrusting in a strongly attached layer and has a similar feel to coralline algae although smoother. It doesn’t seem to be harming or competing with my corals, but I would like to find out what it is for the sake of knowing, and for the fact it is not very pretty. Cheers!

 

[tbrown]

It's hard, not spongey?

 

[Ppoulin99]

It's hard, not spongey?

Yes, hard and encrusting. It covered a lot of the cca up, but I have noticed cca regrowth over it.