Hi. Can anyone tell me how to get rid of this algae. It looks brown but when you take it out of the water it's green and stringy. It smells of seaweed. It's taking over the whole tank. It's all over rocks, the back wall, sand, corals, power head etc. Nitrates are 0.5. pH 8.3. phosphates 0.015. It's killed several corals. I'm trying to clear out of the tank daily but it's growing quicker than I can keep up with it. Video attached so you see how bad it is. It's stringy and flowing.