Plants that grow in fresh water help keep piss clean by stabilizing the bottom surface of ponds , river and lake . They are often used for ornamental purpose in house pond as well as fish tank . However , some plant that grow in fresh water have few natural enemies , grow quick and can overwhelm a lifelike ecosystem , interfere with water recreation and wildlife .

Elodea

Elodea ( Anacharis canadensis ) is a cold - hardy water plant that grows floating freely just below the H2O surface . It is view an oxygenating plant and grows rapidly , providing cover for small fish . Other names of Elodea are ditch moss or pee thyme . It is often used by aquarium hobbyist .

Corkscrew Val

Corkscrew val ( Valisneria Americana ) has interesting , recollective , brilliant green leaves that form a misrepresented bottle screw appearance . It circularize by undergound runners and remain root in the bottom of the body of water .

Hornwort

Hornwort ( Ceratophyllum demersum ) is native to Australia and is another fresh water plant often used in aquariums because it produces oxygen when exposed to light . It can develop float freely in water . When exposed to mud or perplex it produces modify leaves rather than roots that cast anchor it to the bottom . Hornwort has the ability to see to it algae in aquariums or watercourse because it relinquish a chemical that forbid algae from growing .

Water Milfoil

pee milfoil ( Myriophyllum sp . ) is another popular aquarium flora that show up in bodies of water . Also bang as foxtail grass , water milfoil is more tolerant of cold-blooded urine shape than many other freshwater plant life . It has a feathery visual aspect and remains rooted to the bottom with the branches reaching up toward the surface . It is a unspoiled plant for gather up soil and debris that flows into a waterway .

Water Lily

The weewee lily ( Nymphaea odorata ) grows rooted into the bottom of easy - move rivers and ponds that rest at a stable water level . The stems grow toward the lighting and the primary foliage , or lily pad , spreads out over the control surface of the water . The water lily is credibly one of the best known freshwater plant and produces colored and , in some display case , fragrant blooms . Another name for the water lily plant is beaver root .

Hydrilla

Hydrilla ( Hydrilla verticillata ) is an invasive freshwater plant that take shape stocky mats below the control surface of the water . It was introduce into waterways by aquarium hobbyists . It interferes with wildlife replica and water refreshment . It can blow freely and scatter over a large domain or remain rooted to the bottom and farm as much as 2 feet per daylight or , in ideal precondition , up to 25 feet .

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