Hornwort Oxygenating Pond Plant is one of the very best oxygenators that we sell. Hornwort is very easy to grow and helps to eliminate algae by secreting a hormone that inhibits algae growth. Anchor stems of Hornwort in small pots filled with gravel or plant in the substrate in the bottom of the pond. Horwort grows quickly in long strands. The strands can be cut back and the cut pieces can be planted. Hornwort helps to clarify and oxygenate the water and is a great cover for small fish as well as spawning. Sold in bunches.