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Azolla filiculoides (Water Velvet) – Species Profile Azolla filiculoides (aka Water Velvet) is a miniscule floating plant. From a distance it can resemble Duckweed (Lemna minor), due to both having tiny leaves, but the plants are unrelated. In fact Azolla are more closely related to Salvinia. Both are floating, aquatic ferns. This fast growing plant will sprout daughter plants from the parent plant, creating mat-like layer of plant material on the water surface. Like Salvinia, its leaves have a fuzzy, velvety look to them. This comes from the many tiny, water repelling hairs that grow on the leaf surface. Unlike Salvinia, Water Velvet does not grow trailing roots. In a warm body of water with bright lighting, A. filiculoides can take on a rusty red color. Care Level: Easy Preferred Water: pH 5.0 to 7.0, Soft Minimum Lighting: Moderate to Bright Temperature: 59°F to 79°F (15°C to 26°C) Leaf Size: Length, 0.75″ to 1.25″ (1.9 cm to 3.2 cm)