Is this green cyano?

Davisma

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I'm pretty sure it is but I can't seem to kick it.

This tank used to be a fish only tank and is a work in progress. I removed all fish except a purple tang, filefish and a clown pair. I started adding corals slowly from another tank about 3 months ago and for the last 2 months it just won't let up. i've siphoned the sand and removed the rocks and scrubbed them in separate water 3 times since it popped up. I'm only running white light for 2 hours and blue light for 6 or so for a few weeks.

Parameters:
pH: 8.2
NO3: 20
PO4: 0-0.25
Salinity: 1.025

Should I treat for cyano? Thank you for your suggestions

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P-Dub

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Cyanobacteria is, in fact, blue-green algae but not an algae in reality. Blue-green, may also be brown, black or red.
 
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Davisma

Davisma

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Cyanobacteria is, in fact, blue-green algae but not an algae in reality. Blue-green, may also be brown, black or red.

Thank you, I'm aware of this but I've never experienced this bloom and it has no texture to the touch like most algae--it's more powdery and not smooth or slimy at all. it comes back extremely quick after cleaning the tank of it.
 

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Cyanobacteria. Just a color variant most likely. Treat it as such.
 
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