Macro Algae are large Algae species. Macro Algae are found in the ocean floor. They are increasingly used in saltwater aquariums. Macro Algae serve to absorb unwanted substances such as phosphates and nitrates from the aquarium.
They also provide a natural feel the aquarium. They provide hiding places for fish and serve as food for herbivorous fish.
Common species of Macro Algae are Halimeda, Maiden's Hair, Caulerpa, etc.