Author Topic: black algae on sand (Read 1523 times)

ThaDon · « **on:** June 04, 2013, 17:31:25 »

I have black algae on the top of the sand what is it from. I sterd it up but just came back stronger.

Bucknutz · « **Reply #1 on:** June 04, 2013, 17:41:02 »

Could be cyno? Red to brownish? Your best bet is to use the algae guide on the front page.

http://www.ohioreef.com/index.php?topic=14117.0

marineman · « **Reply #2 on:** June 05, 2013, 12:36:03 »

Make sure it isn't hydrogen sulfide, too. Likely only the case if your sand bed got disturbed, but can cause SERIOUS problems if it is.