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View Full Version : Brown spots growing on coralline


usmc121581
03/03/2013, 03:43 PM
I have these brown spots growing on one side of my 180 gal. I can take a brush and scrub it off but it comes right back. What I find amusing is it only on the right side of the tank. Nitrates just tested at 0 a and phosphates tested at 0.

barry_keith
03/03/2013, 04:19 PM
I have this in my tank as well. I always figured its just brown coralline algae

usmc121581
03/03/2013, 05:34 PM
That's what I am beginning to think.

Palting
03/03/2013, 05:47 PM
Coraline usually has to be scraped off with a scraper, usually dos not come off with a brush. Most likely this is just brown turf algae if it comes off with a brush. It probably seeded in that part of the tank, but you'll likely see it in other parts in the future. If it gets to be a problem, get an urchin. They love that stuff.

cherubfish pair
03/03/2013, 10:05 PM
+1 on the urchin.

usmc121581
03/04/2013, 04:43 AM
I have one in my refug, he used to be in the tank but decide to rearrange stuff. Back he goes.