Algae??? What is that?

NorthernReefer

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Can any of you identify what this is as the bottom of my weeping willow? Whatever it is has stayed isolated to one rock structure, I haven't seen it anywhere else. If you do know what it is, how do I manage it? Currently it is around the base of my weeping willow and my duncan. TIA.

145343982_231778295160540_3165732833167654417_n.jpg
 

tnw50cal

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Well pictue looks like high in blue light so I'm going with GHA even though it looks brown. Since it's only on the two corals make them mad(remove from tank) and put hydrogen peroxide on the GHA and let it stay on the GHA for a few minutes. Then rise in remove from tank tank water water and put coral back in tank. GHA should be dead and gone in a few days.
 
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NorthernReefer

NorthernReefer

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Well pictue looks like high in blue light so I'm going with GHA even though it looks brown. Since it's only on the two corals make them mad(remove from tank) and put hydrogen peroxide on the GHA and let it stay on the GHA for a few minutes. Then rise in remove from tank tank water water and put coral back in tank. GHA should be dead and gone in a few days.
Thank you for your feedback.
 

lazlodawg

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Looks a little slimy rather than filamentous in the picture. Could be dinoflagellates? Then again, I have dino PTSD... Does it seem fibrous or slimy?
 

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