I had something that looked very similar to this in my 55 before I upgraded to my 210.
I know this will be frowned upon, but I used API Algae Fix Marine and it cleared it up. I stopped dosing it once the stuff was gone and it never came back. It only took about two weeks for it to go away.
I know this will be frowned upon, but I used API Algae Fix Marine and it cleared it up. I stopped dosing it once the stuff was gone and it never came back. It only took about two weeks for it to go away.