Jason, I'm not sure what kind of hair algae you have but when I went on vacation for 4 weeks and came back my tank was covered in green hair algae .
I bought a yellow foxface and within the next couple of days all my algae was gone again. However I also did do some large W/C as well.
Try using your hands and manually removing as much as you can. If it's just on a few pieces of rock, remove the rocks and treat or care for them outside your aquarium to avoid harming all your corals.
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