Id of sandbed bacteria/algae

[Smallslandreefer]

Heyy guys, i need some help identifying what is on my sandbed. I have attached some picture od some sand grains under the digital microscope. Especially the red stuff if anyone knows please help id.

 

[Spare time]

I would think cyanobacteria for the red

 

[Smallslandreefer]

I would think cyanobacteria for the red

Thank you for replying. I increased my feeding regiment. But my no4 and po4 levels are normal in the tank. Is blwping the sand a bit with a turkey baster when it forms going to help?