Cyano Bacteria Against Glass

[Jon T4S]

Hi, I have a small 13.5G Reef tank, recently I noticed cyano bacteria(red) up against the glass. It disappears when disturbed, but is right back there again in a few hours.

It is nowhere else in the tank, so I wonder should I leave it? or is there something I can do?

Thanks!

 

[Aldrinlights]

Best way is to export it. You can use blue clean shop towel paper towels and wipe it off the glass to export it. I do this frequently myself for stubborn algae.