Ceratophyllum aquarium plant Commonly know as hornworts or coontail are widely distributed around the world. Hornworts is a rapid growing plant. In lower light it is rather thin and bright green. As light intensity will increase plant gets bushier and in high light changes red. In aquariums found two genius. Ceratophyllum dermersum Common Name: Coontail Description pH range: 6.5 - 7.5 Temperature range: 15 - 28C Water hardness: Soft-very hard Propagation: By cuttings. Habitat: Cosmopolitan Packing Read more