ID on algae please!

TreyC2010

But baby, the fish need it....
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I’ve been battling some algae for a little bit but I thought it was only cyano. Is this a form of it or have I been wrong about what I have?

My test kits (Nyos, Hanna, Salifert) show undetectable nitrate and phosphate. ICP also shows low phosphate. I don’t feed heavy and keep up with maintenance, but I still seem to have a “dirty” sand bed and rocks.

Tank is 190 total. Two tangs, 2 clowns, flame hawkfish, midas blenny, and melanurus wrasse. All of my other numbers came back good in my icp test too. The algae is red. I blow the rocks off once a week with my pmup. I’ve lost some corals recently and I’m not sure if it’s just nutrient starved from me or this algae or another cause.
 
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TreyC2010

TreyC2010

But baby, the fish need it....
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Update:

Tried Reef flux 2 separate times but it won’t kick it. I’ve scrubbed rocks, pulled algae, upped feeding frozen, lowered feeding pellets, and tried to blow off rocks periodically. My Melanurus picks off most of my cuc so I’m stuck with minimal snails too. I’m at a loss. Can anyone help?
 

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