Coralline?

[NarwhalLover3]

I have this dark green algae of some sort growing on the glass of my tank in small circles, and it's such a pain in the butt to scrape off. It's pretty rough too. Thanks.

 

[danbstrong]

I have this dark green algae of some sort growing on the glass of my tank in small circles, and it's such a pain in the butt to scrape off. It's pretty rough too. Thanks.

Could be corraline comes in a few dif colors and green is one but usually not a dark green
Can you post pics?

 

[NarwhalLover3]

I'll try next time it grows. I scraped it off right before I crated the thread

 

[NarwhalLover3]

*created.