- Scientific name: Blyxa japonica
- Synonym: Hydrilla japonica
- Common name: Japanese Bamboo Plant
- Family: Hydrocharitaceae
- Group: Aquarium plants
- Max height: 7-15 cm
- Distribution: Asia; China, Taiwan, Japan and Papua New Guinea
- Habitat: Found in stagnant, shallow pools, rice paddies and marshes and also in slow-flowing iron-rich tropical forest streams.
- Substrate: Nutrient rich substrate
- Placement in aquarium: Midground and foreground in small groups.
- Planting density: 2-3 plant for 20 cm2
- Lighting needs: Medium-Strong
- Temperature: 22-26 °C
- pH: 5.5-6.5
- Hardness: 5-11 NK°
Description: Blyxa japonica has become popular foreground plant in the planted aquarium hobby in the recent years due to its attractive grass-like appearance. The plant is not too difficult to grow if its basic requirements are met: intense lighting, CO2 injection, and fertilization including nitrate, phosphate, potassium, and micronutrient supplementation. Under these conditions the leaves of Blyxa japonica will develop golden and reddish hues and the plants will exhibit more compact growth. In less light aquariums, Japanese Bamboo Plant becomes taller, and it will take on a beautiful green coloration. This aquatic plant produces an impressive root system and appreciates a nutritious substrate. Under high phosphate levels in shallow tanks, small white flowers will form on the end of short stalks. Despite its appearance its long, slender leaves grow from an internal structure of short stems. Japanese Bamboo Plant produces basal side shoots which can easily be divided from the main plant with a sharp knife. During replanting it can be a little difficult to hold the buoyant stem down in the substrate, however, they take root quickly. Blyxa japonica is often used by Takashi Amano in his nature-style aquariums usually in front of large midground rocks or as a transitional plant between the midground to background in larger aquariums.
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