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:

 

[zanoshanox]

do you mean class or glass? Exaclt what color is the red? Pinkish is good but red and green are nuisance algaes.

 

[nimo1969]

sorry glass
Yes pinkish