What kind of algae is it?

[hyla84]

Thanks in advance :)

 

[mborn]

looks like bryopsis.

 

[hyla84]

looks like bryopsis.

What can I do?

 

[mborn]

Bryopsis generally does well in higher nutrients (N and P) and/or when there’s not a lot to compete with it, such as with a new tank. It can also spring up on live rock that isn’t completely cured. In a new tank, it generally goes away when things dial in and nutrients drop. In a more mature tank with nutrient issues, carbon dosing for enhanced growth of heterotrophic bacteria and/or a refugium or similar with macro algae like chaeto will also out-compete bryopsis. If it’s just in a few spots, pick it off by hand while you deal with the underlying issue.

 

[hyla84]

I am havig troubles with N and P actually, I've redone the layout a month ago. I'll do as you said, put rowaphos and bacteria and see how it goes :) Thanks a lot

 

[mborn]

Go slowly with the rowaphos to see how your corals react.

 

[hyla84]

I'll put half dose just to make sure

 

[tidefanjam]

Definitely bryopsis, I just finished a round of Fluconazole, wiped it out of my tank