Is there a nutrient level in the tank that green spot algae can not grow in? My Phosphate stay around 2.0 but it still comes back. Should I maybe go higher or is there something else I can do to prevent it from coming back?
lighting??? or lower your ferts.
I usually blame green spot on sunlight in the room.
In my experience, sunlight brings on GDA, but high light over low light plants brings on GSA.
What plant(s) is it on? I usually have it pop up on anubias and crypts.