A submerged or partially submerged aquatic plant, especially one of the waterweed family.
From Greek elodes, meaning 'marshy' or 'swampy,' derived from helos (marsh or swamp). The term was adapted into scientific nomenclature to describe wetland plants.
Elods are nature's aquarium filters—they're so good at absorbing excess nutrients from water that aquarists worldwide use them to keep fish tanks healthy and clear.
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