Cryptocoryne Pontederiifolia

Quick facts

Identity

Also known as

Water trumpet; Crypt pontederiifolia

Synonyms

Cryptocoryne cordata var. pontederiifolia

Environment

Freshwater

Native to

Indonesia (Sumatra), Singapore (introduced)

Habitat

Freshwater tidal zones and riverbanks on the northwest coast of Sumatra, growing emersed or submersed alongside nipa palm, occasionally exposed to brackish influence

Sourcing

Aquacultured

Conservation

Not Evaluated

Care

Care level

Easy

Growth form

Rosette

Max height

4 – 10 in (10 – 25 cm)

Spread

8 in (20 cm)

Growth rate

Slow

Placement

Midground, Background

Water

Temperature

72 – 82 °F (22 – 28 °C)

pH

6.0 – 7.5

GH

3 – 15 dGH

dKH

2 – 14 dKH

PAR

20 – 50 PAR

Flow

Low-Moderate

Light

Low

CO₂

Beneficial

Planting

Substrate

Nutrient-rich preferred

Feeds from

Roots

Fertilizer needs

Medium

Colors

Green, Pink

Feeding & breeding

Propagation

Runners

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Care guide

Overview

Leaves reach 4 to 10 inches on long petioles, forming broad arrowhead blades in olive-green with a pink blush beneath. This rosette-forming crypt spreads slowly by runners into a dense clump and tolerates a wide range of hardness and pH. It resists melt after transplant but sulks if uprooted or rescaped once established.

Care

This crypt tolerates a wide swing of water hardness and mildly acidic to neutral pH, making it forgiving in both soft and hard tap water. It grows well under low to medium light without CO2 injection, though added CO2 speeds up establishment and can intensify leaf coloration. Once planted, it prefers to be left undisturbed, as it settles slowly and resents frequent uprooting or rescaping.

Planting & trimming

Plant individual crowns in the substrate with roots covered but the rhizome crown left exposed, spacing them a few inches apart to allow leaves room to spread. Pressing root tabs into the substrate near the base helps the plant settle in and establish faster. Avoid moving or replanting it once it has rooted, since disturbance often triggers melt.

Fertilizing

Roots draw heavily on nutrients, so a nutrient-rich substrate or regular root tabs are the most effective way to feed it. A weekly dose of a liquid all-in-one fertilizer supplements the water column, particularly for iron and micronutrients. Yellowing leaves, holes, or stalled growth usually point to a nutrient shortfall rather than disease.

Propagation

New plantlets form from runners sent out along the root system, gradually forming a dense clump around the parent plant. Once a daughter plant has developed its own root system, it can be gently separated from the runner and replanted elsewhere. Division is best done during routine maintenance rather than as a dedicated propagation event, since the plant grows slowly.

Problems

Compared with most crypts, this species is unusually resistant to crypt melt after transplanting, a trait linked to its native tolerance of fluctuating tidal water conditions. Algae fouling on the leaves is the most common complaint and typically traces back to excess light, weak flow, or insufficient fertilization rather than a fault in the plant itself. When melt does occur, leaving the root system undisturbed allows new, better-adapted leaves to emerge within a few weeks.

Sources

1. Cryptocoryne pontederiifolia care: light, CO2 and placement · TankBud
2. Cryptocoryne pontederiifolia Care: Light, CO2, Growth
3. Cryptocoryne Pontederiifolia Care Guide | Melbourne Tropical
4. Cryptocoryne Pontederiifolia – Nature Aquariums USA

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