eww green algae

[poohbear]

I have green algea growing in one corner of my tank.
It looks pretty weird as its about 6 inches wide and 3 inches deep.
You can actually see the lines where it stops.
Anyway as soon as the java moss I have orderd arrives Im gonna clean it all away but does anyone know whats causing it.
All my water perameters are fine

 

[enchanted]

poohbear, their is more to a tank than just Ammonia, Nitrite, and Nitrate.

Do you have any other live plants than just the java moss you have ordered? Most likely it is related to a nutrient imbalance or excess nutrients in the water. If you have no other live plants try doing less lighting for the time being.

If you have other live plants then make sure they are not showing any signs of deficiency and add more.