Red slime algae/ clean up crew

[sonnyteee]

Hey guys what is a good algae/red slime algae invert that is Reef safe and will clean live rock and substrate?? I found a small dot on my live rock and I want to stay ahead of it. It's a 20 gallon tank

 

[Hitman]

I swear I read that Cerith snails eat cyano. I know on reefcleaners.org they have cyano listed as one of the things they eat as well and John is a stand up guy so I don't think he would say it if there's not proof.