Phosphates in Your Marine Aquarium

Phosphates in Your Marine Aquarium. Even though your nitrate levels seem to be under control, are you still having a problem getting rid of the Brown Algae and Green Hair Algae in your marine aquarium? In spite of updating your reef tank lighting and keeping your trace elements at the right level, are your corals still not growing as well as they should? You might want to check your phosphate levels.