Hello, a month ago, I started to see a white veil, as time went by, a green tint was added, after a while I couldn't see anything anymore. I had a very strong light >50 lumens per liter, I finally reduced the light by more than half, I reduced the fertilization (tnc complete), the co2 is still around 25-30 ppm. I reduced the lighting time from 8 to 5 hours, change 90% of the water, nothing to do, the algae are still present. So I have in mind to make a blackout but I don't know if it's efficient on this algae, I'm afraid to lose my plants, how to proceed to avoid too much damage? thx