Is green algea and red algea good or bad ?

[nimo1969]

I have spots of red algea on my class and green algea on my class . Is this a good thing or bad algea :help: ?
Thanks
Nimo1969

 

[keith burn]

Originally Posted by nimo1969
I have spots of red algea on my class and green algea on my class . Is this a good thing or bad algea :help: ?
Thanks
Nimo1969
got pic's
well most algea on glass can be removed

 

[alyssia]

The red might be cyano, unless it's hard; then it's probably coralline.