Algae ID

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Hi guys, Can anyone please ID the algae I have all over my rocks, I'm thinking Calothrix but not 100% sure. Tank is 6 months old so still going though a bit of the uglies I guess. PO4 is around 0.04, NO3 5ppm, nothing too out there. At this stage I have 4/5 Turbo's, 3 Trochus with another 6 on there way and a Lawnmower Blenny in a roughly 96gallon/365litre system, anything else I need to do?
 

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You will need a microscope for this one. Definitely not algae
 

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