
Giant duckweed
Spirodela polyrhiza
Araceae

Spirodela polyrhiza
Araceae
Lives wild in Albania, Australia, Austria, Baltic States, Bangladesh, Belgium, Belize, Benin, and 95 more countries.
Spirodela polyrhiza (orth. var. S. polyrrhiza) is a species of duckweed known by the common names common duckmeat, greater duckweed, great duckmeat, common duckweed, giant duckweed, and duckmeat. It can be found nearly worldwide in many types of freshwater habitat.
Plants that cope with low light, soft water and a beginner’s mistakes, and how to plant them so they grow.
Soft, acidic water, subdued light, sand, roots and fallen leaves: how to set up a biotope aquarium from the Amazon and the rivers around it.
Hard, alkaline water, sand and rock: an aquarium from the rivers and lakes of Mexico and Central America, with cichlids and livebearers.
Two completely different aquariums: forest rivers with soft, brown water, roots and leaves, and Rift Valley lake cichlids in hard, alkaline water with big rock piles.