Azolla caroliniana portion in 4 oz container - Floating Live Plants for or Aquariums or Ponds You get a portion of Azolla Caroliniana in 4 oz container. They can be placed in aquariums or ponds. These oxygenating plants keep the water clean and filtered in your aquarium or pond Controls algae by absorving nutrients from the water. They are low maintenance and reproduce quickly The serve as hiding places for small fry and invertebrates Since this is a small floating plant, make sure your water filter is properly fitted to not absorb these plants.