Red algae, what is this stuff?

[QuarantinedCorals]

Hi everyone, I’m helping a friend with their algae problem but I would appreciate some help trying to identify what we’re up against. The tank looks much better now, I took out all the rocks and gave them a good scrub, they stay clean for about a week and the main issue is the red slime algae that comes back a week after it gets cleaned up. The nitrates were high when I checked before the first water change, it was at 80ppm and I haven’t checked for phosphate yet. Can anyone let me know what it is and some possible treatments or even what it can be caused by?

 

[dbowman5]

it looks like cyano but usually that is a low nutrient issue i suck it out with a baster and turn off the skimmer and it goes away.