What is this this red algae

[DEE’S reef]

So my tank was set up in mid December 2025 and has been running for 5 months and I’ve seen some red on my rocks and sand but when I lifted my back of my lid and saw my top rock was getting cover in some sort of red algae. Should I be worried and what should I do to treat it.

 

[sixty_reefer]

Hi, that’s Cyanobacteria