Algae on sand and rocks coming back

[heyitskelton]

I'm not sure what this algae is, it grows like crazy and very fast. I thought it was cyno so I bought some chemiclean and put that in the water and followed the instructions on the box. it looked great afterwards, nice white sand, but its back but it doesn't look like it used to. it looked almost neon orange, but now its brownish. hope someone can help me ID this algae and how to get rid of it. put the lights on white so it is more visible.

 

[heyitskelton]

didn't mean to post this one, sorry.