I posted on here a few weeks ago about having a hair algae problem. Came to the conclusion i need to use RO water so i purchased an RO/DI system and have been doing 10-20% water changes every week for a few weeks now. The algae seemed to slow down for a while now it is back again. Phosphates are about 0.1 and nitrates are between 20-50ppm. I do rinse the food first. Any ideas???