Hair algae is light green in color. It grows in strings and can attach to almost every surface. While its growth rate varies, it is mostly very rapid.
This algae usually returns within hours after manually removing it from the aquarium. One benefit of hair algae is that it is a good food source for plant eating fish. Its rapid growth rate however make it extremely difficult to control. As a result, plant and fish life are threatened by its negative impact.
Hair algae thrives on nitrates in excess of 10 ppm.
