Elodea Densa is also known as Egeria Densa and Anacharis and is native to areas of South America.
Is Elodea an oxygenating plant? Yes, indeed it is. In the correct environment, Elodea grows fast, adds significantly to the available oxygen in the aquarium water, keeps blue-green algae suppressed, is ideal cover for small fish and is also a ready source of food for your fishes.
Elodea is best planted in clumps of four to six stems and is best anchored under the substrate of your tank.
By planting Elodea in a clump you immediately provide an area of cover for smaller fishes.
Planting several clumps of Elodea in a line, each a few inches apart and around four inches from the rear of your aquarium can quickly provide a curtain behind which fishes can swim so that you don’t see all of your fishes at the one time.
Temperature tolerances of Elodea
Elodea will thrive in temperatures ranging from around sixty-degrees Fahrenheit to over eighty-degrees Fahrenheit so it is perfectly adapted to life in a tropical aquarium.
It should be noted that whilst Elodea Densa is native to Argentina, Brazil and Uruguay, it has long been a popular choice both in aquaria and in ponds so it is now widespread across all temperate zones.
Elodea is easy to propagate in that it is necessary only to take stem cuttings and plant these in clusters. Elodea prefers a nutrient-rich environment with plenty of overhead light but its growth needs to be controlled, as it can quickly form a canopy over the surface of the aquarium, blocking the light from other plants beneath it.
Disposing of Elodea
Some states have banned Elodea as being an invasive species. My general advice regarding all non-native plants and specifically regarding Elodea is to compost all excess plant material removed from your aquarium. Once removed from the water, the plant can die in as little as one hour so disposal by composting should present few issues.