Ceratophyllum demersum is one of the most popular aquarium plants in the trade.  Hornwort, or Coontail as it is more commonly refered to, is able to tolerate a wide range of aquatic conditions which is the reason for its popularity.  Ceratophyllum demersum is also very common is the water garden industry where is is used as an oxgenating plant for small water features and ponds.  Hornwort is fine with just being floated in a body of open water and can be broken into pieces to establish new plants.  Ceratophyllum demersum is native to the United states and makes an excellent cover for fish to lay eggs on or for fry (baby fish) to hide in. 

Common Name:  Hornwort, Coontail    

Family Name:       Ceratophyllaceae     

Native To:              Many parts of the world, some natural, some introduced    

Lighting:                Moderate    

Requirements:       Easy plant but requires at least moderate hardness    

Growth Form:        Stem     

Growth Rate:          Fast     

Placement in Tank: Mid - Background or left floating