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Rotala Wallichii
Rotala wallichii
Plantae›Tracheophyta›Magnoliopsida›Lythraceae
📍 Southeast Asia & South Asia
Rotala wallichii produces delicate, needle-like whorled leaves that turn vivid pink-red under high light with CO2 and iron supplementation. It is one of the most demanding stem plants but creates unmatched visual impact in high-tech aquascapes.
Tank Mates
Gentle foragers that won't damage delicate foliage and help control algae
Excellent algae control without harming plant structure; thrive in similar water parameters
Small, peaceful fish that won't uproot or damage fine-leaved stems
Algae-eating fish that respects plant integrity and prefers acidic, soft water
Companion stem plant with similar care requirements and complementary aesthetics
Foreground plant that pairs well; both require high light and CO2 for optimal growth
Common Diseases
Nutrient Deficiency (Nitrogen/Iron)
Yellowing leaves, stunted growth, pale coloration despite high light
Increase liquid fertilizer dosing; verify macronutrient and micronutrient levels; consider all-in-one fertilizer if using separate dosing
Algae Overgrowth (Green/Black Spot)
Green film or black spots on leaves; reduced photosynthesis and plant vigor
Reduce photoperiod to 8 hours; increase water changes; add algae-eating shrimp or fish; maintain CO2 and nutrient balance
Melting (Tissue Decay)
Rapid leaf deterioration, mushy stems, plant collapse after planting
Ensure stable water parameters (pH 5.0-6.5, temperature 22-28°C); maintain high CO2 levels; perform 30% water change; trim affected portions
CO2 Deficiency
Slow growth, pale color, leaf curling, poor stem development
Install or increase CO2 injection to 20-30 ppm; verify diffuser function; check regulator pressure; allow 2-3 weeks for recovery
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Quick Facts
- co2
- Required
- diet
- Water column feeder
- light
- Very high
- tank size
- 20 gallons minimum
- growth rate
- Medium
Water it likes
- ph
- 5.0–6.5
- ammonia
- 0 ppm
- nitrate
- <20 ppm
- hardness
- 0–6 dGH
- temperature
- 72–82°F (22–28°C)