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Here’s all about Hygrophila polysperma — a fast-growing, beginner-friendly stem plant that’s ideal for new aquariums and known for its hardiness, rapid growth, and ability to control algae by nutrient competition.


🌿 Scientific Classification

  • Scientific Name: Hygrophila polysperma

  • Common Names: Indian Swampweed, Dwarf Hygro

  • Family: Acanthaceae

  • Origin: Southeast Asia (India, Bangladesh, Thailand)


🌱 Plant Description

  • Type: Stem plant

  • Height: 20–40+ cm (8–16 inches)

  • Width: 5–8 cm spread (clusters)

  • Leaf Shape: Narrow oval to lanceolate, opposite leaf arrangement

  • Leaf Color: Light green to pinkish-brown under high light

  • Growth Rate: Very fast


💧 Tank Requirements

Parameter Ideal Range
Temperature 22–30°C (72–86°F)
pH 6.5–7.5
Hardness Soft to moderately hard (GH 3–12)
Lighting Low to high (color varies with light)
CO₂ Not essential but promotes faster, bushier growth
Substrate Not picky; grows even in inert gravel, though nutrient-rich substrate improves performance

🌾 Growth & Propagation

  • Propagation: By stem cuttings; simply cut and replant tops

  • Spacing: 2–3 cm between stems to avoid overcrowding

  • Trimming: Regular trimming needed to prevent surface takeover

  • Replanting: Cut top portions root easily when planted in substrate


🌟 Color Forms & Variants

  • Standard Green: Commonest form; bright green under moderate light

  • Sunset Hygro / Rosa Nervis: Rare cultivar with pink veins and reddish hues

  • Variegated types: Sometimes found with mottled leaves


🧠 Care Tips

  • Excellent for new tank setups to stabilize the environment

  • Great for absorbing excess nutrients, reducing algae risk

  • Can grow emersed in open tanks or paludariums

  • If left unchecked, it can grow out of the water and flower


⚠️ Common Issues

Problem Cause
Pale or yellow leaves Iron deficiency or poor substrate nutrients
Leggy growth Not enough light or insufficient trimming
Leaves melting Transition shock (emerse to submerse)
Overgrowth Regular trimming required due to fast growth

🐠 Compatibility

  • Very compatible with shrimp, small community fish, and bettas

  • Avoid with goldfish or large cichlids that may uproot or nibble plants

  • Great hiding spot for fry or small fish due to dense foliage


📌 Quick Summary

Feature Details
Type Stem plant
Color Green to reddish with light variation
Placement Background or midground (when trimmed)
Growth Rate Very fast
Light Requirement Low to high
CO₂ Requirement Optional
Difficulty Very easy

Why Choose Hygrophila polysperma?

  • Beginner-friendly and undemanding

  • Rapid growth helps combat algae

  • Adapts well to many water conditions

  • Perfect for low-tech tanks and planted communities



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