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Old 11-10-2013, 03:42 PM   #1
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Thick brown algae diatom issue

Not sure what this stuff is. It kind ok looks like sponge or cauliflower is it a type of diatom? Anyone know?

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Old 11-21-2013, 08:33 AM   #2
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Thanks for the great replies!! Haha
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Old 11-21-2013, 11:04 AM   #3
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Looks to be some sort of sponge...if you're worried about it, just suck it off with some tubing..nbd
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Old 11-21-2013, 11:08 AM   #4
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I don't think it's actual sponge. I tried sucking it out. Wasn't working to well. Doesn't seem to be spreading much more than it has. It's all the way across my 55..
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Old 11-21-2013, 11:45 AM   #5
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The picture is hard to see, but this website has good descriptions and pictures.
Might be calothrix?
As far as getting it off the reefs, maybe try a soft tooth brush.
Nuisance Algae ID Guide
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