Elodea canadensis (Canadian pondweed) is a non-native oxygenator of prodigious growth capability, I will only reluctantly sell you this if you can give me a good reason why you can’t use a native oxygenator. It does a great job on oxygenation but is a complete thug. It absolutely must not be planted anywhere where it could establish in the wild. Mostly I sell this to schools and universities for research purposes and where it is disposed of safely after use. Available Spring to Autumn.
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