Cyanobacteria?

[aMbi]

Hello all,

Just looking for a positive ID for Cyanobacteria. Tank is 5 months old and just started growing red alage. Some is slimey, some is stringy. Growing on glass, rocks, and corals. No3 is 7mg/l phosphates are .2.

 

[MnFish1]

does it go away in the AM and reappear at night - probably.
Can you siphon it off - probably.
You need to put up some pictures if you can under white light

 

[aMbi]

Last 3 pics under 100% white light.

 

[MnFish1]

Whether it is or not - it is extremely minimal - and would not worry about it at this point.