Hello, my 15-gallon column aquarium has been up since February. Ever since I turned on the lights in march after completing the cycle, I have had a hair algae problem. My parameters are this: salinity - 1.025, Ph - 8.0, Nitrates - 5ppm, Phosphates - 0ppm, Alkalinity - 9.1 DKH, Calcium - 420ppm. I had diatoms for like 2 weeks after turning on the lights, but I just decided to run GFO which got rid of the diatoms. Then about a month later I had some hair start, and it seems to never go away no matter what. It has been around 5-ish weeks since the hair algae has been around. Any suggestions?


