Cryptocoryne Usteriana Green

Quick facts

Identity

Also known as

Philippine Giant Crypt

Synonyms

Often confused with/sold as Cryptocoryne aponogetifolia

Environment

Freshwater

Native to

Philippines (Guimaras Island)

Habitat

Fast-flowing, mineral-rich limestone rivers, growing mostly submersed anchored in hard rocky or clay substrate

Sourcing

Aquacultured

Conservation

Not Evaluated

Care

Care level

Easy

Growth form

Rosette

Max height

8 – 28 in (20 – 71 cm)

Spread

12 in (30 cm)

Growth rate

Slow

Placement

Background

Water

Temperature

72 – 82 °F (22 – 28 °C)

pH

6.5 – 8.0

GH

5 – 20 dGH

dKH

7 – 21 dKH

Flow

Moderate

Light

Low

CO₂

Beneficial

Planting

Substrate

Nutrient-rich required

Feeds from

Roots

Fertilizer needs

Medium

Colors

Green, Purple

Feeding & breeding

Propagation

Runners, Rhizome division

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Care guide

Overview

Giant Crypt describes one of the largest Cryptocoryne species in the hobby, producing long, strap-like green leaves with a heavily hammered surface and a reddish-purple underside. Suited to tall, mature background positions in hard, alkaline water including African cichlid setups, it grows slowly and resents being uprooted once established.

Care

A giant among crypts, this plant needs a tall tank and plenty of open floor space to accommodate its long, strap-like leaves, which can reach roughly two feet in height. It tolerates a wide light range from low to fairly bright but shows its best hammered texture and deep burgundy leaf undersides under moderate light. Unlike most Cryptocoryne species, it favors harder, more alkaline water, which makes it one of the few crypts suited to African cichlid aquariums, and it is tough enough to withstand rougher tankmates once established.

Planting & trimming

Bury the rhizome and root mass deeply in at least four inches of nutrient-rich substrate, leaving the crown at the surface, and give the plant generous spacing since a mature specimen can spread about a foot wide. Because it dislikes being disturbed, choose a permanent spot in the background before planting and avoid uprooting it later. It can also be grown emersed in paludariums or as a house plant in very humid conditions, which is a useful way to propagate stock without disturbing the main display.

Fertilizing

This is a heavy root feeder, so it depends on a deep, nutrient-rich substrate supplemented with root tabs rather than on liquid fertilizers alone. Iron-rich tabs pushed near the rhizome and root mass support the intense coloration and steady leaf production. Pale new growth or stunted leaves usually point to a substrate that has become depleted and needs fresh tabs.

Propagation

New plants are produced from runners sent out by the rhizome, which can be separated once they have developed their own root system, or by dividing a mature rhizome into sections each bearing growing points. Growth is slow, so propagation takes patience compared with faster-multiplying crypts.

Problems

Like other Cryptocoryne species, it can melt back after being planted or moved, losing most of its leaves before regrowing from the rhizome over several weeks. Once settled it is fairly resistant to further melting compared to smaller crypts, but sudden major changes in water chemistry can trigger another episode. It is otherwise not prone to disease and tends to shrug off algae once established, since its tough, leathery leaves are not an easy target.

Sources

1. Cryptocoryne usteriana care: light, CO2 and placement · TankBud
2. Cryptocoryne usteriana - Flowgrow Aquatic Plant Database
3. Giant Crypt (Cryptocoryne usteriana) Care Guide & Plant Profile | Guidarium

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