Red Cyno?

[Rfields987]

Is this Red Cyno? It doesn’t fit with other pics I’ve seen and I’ve had to dos nitrate to get my levels up - still zero phosphate

Phos-0 (Hanna ULR)
Nitrate 5-10 (Red Sea)
Salt - 1.025
pH - 8.3
Temp -79.5
Alk - 8.5 (trident)
Ca - 417 (trident)
Mg - 1320
Tank cycled - July 2020
Radion XR30 Pro x4 in x2 36” Aquatic Life DX18 with atctinic, Fiji purple and coral plus
Red Sea 900 3XL ~240gl with sump
Reef Octopus Skimmer
4 MP60s
8 fish (5 tang, 6 line, hawk & clown)
10 frags (SPS)
3 Gonipora (small)
1 bubble tip (recently split so now 2)
1 plate coral
1 small clam

 

[Juniorh2r]

Look like it

 

[Juniorh2r]

Chemi clean cyano treatment it will clear that up

 

[SHNICI]

Not 100% for cyano, the cyano usually isn't that much flapping and moving from the water flow. May be diatoms or dinoflagellates. If you can get another video, and let us know do you have to over the sand and/or to another areas? Cyano requer usually both Phos and Nitrates. I can bet on dinoflagellates.