Does Hygrophila Polysperma need CO2?

No. Hygrophila Polysperma grows in low-tech tanks without CO2 injection or liquid carbon supplementation.

What light does Hygrophila Polysperma need?

Hygrophila Polysperma is a low-light plant. Standard aquarium LEDs cover this with room to spare. It is one of the plants you can light from a basic shop hood and still get growth.

Is Hygrophila Polysperma safe for shrimp?

Yes. Hygrophila Polysperma is safe in shrimp tanks. The usual quarantine still applies: any plant from a commercial nursery should be soaked and rinsed first to flush copper and pesticide residue.

Image: Wikimedia Commons — attribution available on this site.

Plant appearance can vary with lighting, nutrients, CO₂, and whether it is grown submerged or emersed.

easylow lightNo CO2 neededfast growthstem

Hygrophila Polysperma

Q: Is Hygrophila Polysperma beginner-friendly?

Hygrophila Polysperma is rated easy for difficulty. Almost impossible to kill. Trim frequently, it becomes a jungle fast. Plant cuttings directly in substrate. Good for giving a new tank a head start on nutrient cycling.

Hygrophila polysperma

Also: Dwarf Hygro, Indian Swampweed

Hygrophila polysperma is one of the most beginner-tolerant stem plants. It grows in almost any conditions, tolerates low light, and does not need CO2 or fertiliser. Its fast growth helps reduce algae by competing for nutrients.

Care at a glance

Difficultyeasy

Lightlow

CO2Not needed

FertiliserNot essential

Growth ratefast

Max height50cm

Placementbackground

Min tank20L

Water parameters

Temperature18–30°C

pH6–8

Shrimp safeYes

Herbivore risklow

Propagationstem cuttings

Beginner guidance

Almost impossible to kill. Trim frequently, it becomes a jungle fast. Plant cuttings directly in substrate. Good for giving a new tank a head start on nutrient cycling.

Cautions

Considered invasive in some regions; do not release into natural waterways.

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