Hornwort (Ceratophyllum demersum) is sometimes called coontail. Grown indoors in the UK.

You will receive stems 10 cm+ long. 

A native oxygenator, perfect for ponds and lakes. Hornwort is a free-floating plant, Hornwort can grow at great depths making it one of the best native oxygenators available. It has no roots with stems that grow from up to 90 cm that have delicate dense whorls of slender dark green leaves. It sinks to the bottom of the pond in winter to protect itself from the cold and ice and may turn black but as the water warms in the spring it will float back up and turn green again.

Position - Full Sun to Part Shade

Growth - Fast

Flowers - May to Jul