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Elodea provides habitat for many small aquatic animals, which
fish and wildlife eat. Geese, ducks, and swans are particularly
attracted to this plant. Elodea is an excellent oxygen producer and
frequently used by fish to protect fry.
Dense populations of plants reduce the water temperature
and oxygen concentrations when plants die in late summer. However,
dense growth of this plant can create a nuisance, and its closed,
compact structure is not ideal fish habitat.
Elodea averages 4 inches to 3 feet in length depending on water
depth. The American waterweed (Elodea Canadensis) lives entirely
underwater except for a small white flower that blooms at the
surface during summer. Elodea has branched stems with oval-shaped
leaves arranged in clusters of three or four around the stem. The
fruit of the Elodea ripens below the surface. Elodea produces heavy
buds in the Fall that drop to the bottom and then begin to grow in
the Spring; relying little on seed production.
American waterweed (Elodea canadensis) is what many people
commonly think of as "that aquarium plant." It is also known by
several other common names such as Canadian waterweed, common
elodea, or anacharis. The use of these names causes it to be
confused with similar-looking nonnative plants like Brazilian
elodea or hydrilla.
Easily confused with Hydrilla.
Helpful hints to aid in distinguishing Elodea for Hydrilla are:
Broad oval leaves, usually four in number, arranged in
whorls around the stem. Whorls are compact near the growth tip with
spacing between the whorls gradually increasing further down the
A. Spot treat as
needed to maintain navigation channels and swimming areas. Remember
this plant is very beneficial and should not be treated where it is
not a nuisance.
A. Once water
temperatures are around sixty degrees or warmer however this plant
responds equally well to herbicide treatment when mature.
A. One treatment
per season is usually enough.
within two weeks things will be cleared up. Maybe even sooner with
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