Relationship Between Elodea & Snails

Elodea and snails have a symbiotic relationship.
••• snail 1 image by Alison Bowden from

The relationship between elodea and snails has been the subject of science experiments in elementary schools for years. Their interaction is an example of a symbiotic relationship in an ecosystem

Elodea and Snails Overview

Elodea is a common plant used in aquariums because of the underwater beauty and its hardiness. Snails are often used in aquariums both to view and to help clean the tank of algae.


The relationship between snails and elodea is symbiotic in that the snail eats algae and produces carbon dioxide. The elodea takes in the carbon dioxide and, through photosynthesis, creates oxygen, which the snail and every living thing in the tank uses to breathe.


The process is both beneficial to the snail and elodea as well as every other living thing in the tank. The elodea feeds off the carbon dioxide given off by the snail, and the oxygen produced by the elodea helps the algae, which the snail eats.

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