What is this on my back wall??

[dr_ fish]

Over the last week or so I have noticed this brown fuzzy looking stuff gathering or growing on my back wall. Never seen algae like this, so I'm lost at what it is. I have zero algae and have never had any algae issues since starting up the tank.

Params:
S.G. 1.025 Refractometer
pH 8.05 Reefkeeper
Temp 79F*
Nitrates undetectable Salifert
PO4 0.00 Hannah

Any ideas?


http://www.bigboosting.com/hosted/tank/solanabuild/aug18/IMG_5174.JPG%5B/img%5D%22]http://www.bigboosting.com/hosted/tank/solanabuild/aug18/IMG_5174.JPG" alt="" />
[IMG]http://www.bigboosting.com/hosted/tank/solanabuild/aug18/IMG_5174.JPG" alt="" />
[IMG]http://www.bigboosting.com/hosted/tank/solanabuild/aug18/IMG_5176.JPG" alt="" />
[IMG]http://www.bigboosting.com/hosted/tank/solanabuild/aug18/IMG_5177.JPG" alt="" />

[IMG]http://www.bigboosting.com/hosted/tank/solanabuild/aug18/IMG_5176.JPG%5B/img%5D%22]http://www.bigboosting.com/hosted/tank/solanabuild/aug18/IMG_5176.JPG" alt="" />

[IMG]http://www.bigboosting.com/hosted/tank/solanabuild/aug18/IMG_5177.JPG%5B/img%5D%22]http://www.bigboosting.com/hosted/tank/solanabuild/aug18/IMG_5177.JPG" alt="" />

 

[purplegorilla]

Looks like algae to me..Might even be hair algae...

 

[snowmansnow]

Is it diatom? Tank been up about 6 weeks?

 

[dr_ fish]

Dont think it is hair algae because it really looks nothing like hair algae I have had in previous tanks. This is also ONLY on the back wall and nowhere else. The growth pattern looks like fuzzy small spots, not strands of algae.

Don't think its diatoms either, they usually don't form think colonies like this stuff is doing. The tank has been set up for a few months now.

Keep the suggestions coming

 

[ripped tide]

Dinoflagellate algae?