Riccia fluitans
Family: Ricciaceae
Region: Cosmopolitan
Height: 1 - 5 cm
Width: 5+ cm
Light: low-very high
Temperature: 10 - 28 oC
Hardness: very soft-hard
pH: 5 - 8
Growth: medium
Demands: easy
Description
Japanese Takashi Amano has inspired many aquarium owners to keep Riccia fluitans submerged. It can be kept down by tying it to a stone with a piece of fishing line, but new shoots always grow towards the surface, so it may be necessary to prune it with scissors. Under water R. fluitans thrives best with added CO2 and in good growing conditions small oxygen bubbles form on the leaf tips. As a traditional floating plant offers good protection for young fish.Source: www.tropica.com
Related info:
Riccia fluitans in the submerged form