Coarse red hair algea?

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Is anyone elses tank being over run with this stuff?

I have a 15g tank been running 7 months now, everything seems to be doing really well. At first I thought that this macro algea looked nice, but it has since become a nuicance. I tried picking it off the rocks by hand, but it's stuck on really good, and it's spreading fast.

Does anyone have any suggestions on how to remove it? Will an emerald crab eat it?

Thanks, Myles