Green Algae

[STEWARDSONS]

spots of green hav estarted to appear on my glass. what causes this?

my lights are on from 2pm till 10pm, i am running 4 t5's which are 39w, 3 are marine white and one is moonlight blue.

from 2 till about 4.30 there are just 2 marine whites on (on a timer) and when i get in i turn on the other two until 10.

 

[minnnt]

I get these too mate and i am running 2 x 24w t5's... Possible lack of circulation? I don't know as i have plenty in my tank. lol.

 

[RadaR]

See the algae guide in my sig.

Are you injecting CO2 with all that light? How about nutrients?