Blyxa Japonica
Blyxa japonica
Also known as Blyxa, Japanese Blyxa, Japanese Rush
Plantae›Tracheophyta›Magnoliopsida›Alismatales›Hydrocharitaceae
📍 Japan, Southeast Asia
Blyxa Japonica is an elegant plant that produces rosettes of narrow, grass-like leaves with a slightly golden-green hue. It does not spread by runners but instead produces daughter plants around the mother. Under good light and CO2 it takes on olive-golden tones that complement red and green stem plants beautifully. A staple in Nature Aquarium style.
Community Photos
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by @karleenmendoza
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Compatible Livestock
Peaceful algae grazers that won't damage plant leaves and help maintain tank cleanliness
Small, non-destructive shrimp that graze algae without harming delicate plant tissue
Gentle algae-eating fish that won't uproot or damage the plant structure
Small, peaceful schooling fish that add color without disturbing plants or substrate
Excellent companion plant with similar care requirements and complementary leaf structure
Compatible plant species with overlapping light and nutrient needs; creates layered aquascape
Common Diseases
Nutrient Deficiency (Iron/Macronutrient)
Yellowing leaves, stunted growth, pale coloration despite adequate lighting, interveinal chlorosis
Increase fertilizer dosing; use comprehensive liquid fertilizer containing iron and trace elements; perform 25% water change and retest after 2-3 weeks
Algae Overgrowth (Green/Brown Spot Algae)
Green or brown spots on leaves, reduced photosynthesis, plant decline, visible algae coating
Reduce lighting duration to 8-10 hours daily; increase water changes; add algae-eating shrimp or fish; manually remove affected leaves; improve water circulation
Melting (Tissue Decay)
Leaves become translucent, mushy, or dissolve; rapid deterioration after planting
Ensure stable water parameters (pH 6.0-7.0, temperature 22-28°C); increase CO2 supplementation; trim affected leaves; improve lighting gradually; avoid sudden environmental changes
Poor Growth/Stunting
Minimal new leaf development, small pale leaves, plant remains same size for weeks
Verify CO2 injection is adequate (20-30 ppm); increase light intensity to medium-high; boost fertilizer regimen; ensure substrate contains nutrients; check water parameters for stability
Tips from the community 💡
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Quick Facts
- co2
- Required for best results
- light
- Medium–High
- placement
- Midground
- tank size
- 15 gallons minimum
- growth rate
- Moderate
Water it likes
- ph
- 6.0–7.0
- hardness
- 2–10 dGH
- temperature
- 72–82°F (22–28°C)
Legality
No state or federal restrictions on record for this species.
Not legal advice, and possibly incomplete or out of date. Rules vary by state and locality and change over time — always confirm the current regulations with your state wildlife or agriculture agency before buying, keeping, or shipping this species.