Algae takeover without nutrients? I keep a very clean reef environment, maintaining 0ppm nitrates and 0ppm phosphates at all times (API - 2 different kits), however I'm getting an explosion of red hair algae, not sure of the taxonomy, but if you look at the attached photo you'll see what I mean. This has been going on for the past 4 months or so. I do not dose any supplement which contains iron either. So...nutrients are non-existent with algae flourishing. I did upgrade my T5HO bulbs in my fixture a few months ago (ATI Coral Plus, Actinic White, Purple Plus & 10K). But even so, light shouldn't be the reason, the algae needs nutrients in the water, right? I'm afraid that the red hair algae willl spread and affect my corals. Any experienced reef keepers have any thoughts or suggestions? Am I missing something? lol Greatly appreciated!