I would say cyano. Cyano bubble and releases oxygen.
Perfectly normal uglies for a young tank.
Try to up you flow and reduce your light for a while might help.
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Bob
Current Tank Info: 90 gallon,mixed Reef,2-250 watt Optix 3 pendants(Phoenix 14K)2-54 watt T5 Super actnics ,ASM G-2 Gate/recirc mods,70 gal. basement sump,20L ref
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