Help identify mystery algae

[stanfill reef]

OK, I have this purple/red hair algae. It is very hard and bristly. It comes back again and again, even though I harvest it weekly with my water changes. I have attached a few pictures, one of the tank, one of a close up of the right hand side where the algae grows, and one of a clump removed from the tank. My two questions are:

1) What is it?
2) What eats it?

Thanks!
Chris
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class="gc-images" title="Algae in tank.jpg[/IMG] style="max-width:300px" /></a>

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class="gc-images" title="algae.jpg[/IMG] style="max-width:300px" /></a>

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class="gc-images" title="Full Tank.jpg[/IMG] style="max-width:300px" /></a> </fieldset>

 

[stanfill reef]

Oh yeah, please ignore the green algae. I know it is there too, but one thing at a time... And I have tried crabs (blue legs, scarlet) and snails (nasarius, turbos, etc) and they have not worked.