phosophates

What is the actual cause of green hair algae? I have read so many differing opinions on this. Maybe its all of the below: 1) high nitrates 2) high phosophates 3) Out of balance nitrates and phosophates (redfield ratio) 4) high silicates 5) Not enough CUC 6) Too much light 7) All of above 8)...

Hi folks, So I have been dosing Lanthanum from ATM agent green. At first I was dosing 2 mls per day, now I am up to 12 mls per day, to maintain phosophates where I want them. I think it is throwing my alk out of whack too. Has anyone else experienced this and what did you do to rectify the...