Encyclopaedia

Plant atlas
PlantFreshwaterIntermediate
©AI Generated·Proprietary

Alternanthera aquatica

Alternanthera aquatica

Beautiful midground plant with a fast growth rate. Ideal for creating beautiful visual interest.

Taxonomy
Class:Liliopsida
Order:Caryophyllales
Family:Amaranthaceae
Genus:Alternanthera
Species:Alternanthera aquatica

Share

Check out Alternanthera aquatica on Atlarium

PracticeRecognition quizzesPhotos, names, origins, and puzzles to review Atlas species.Open quizzes
Water Temperature

18 - 30 °C

pH Value

5 - 8

Water type

Freshwater

Light

Medium - High

CO2

Low - High

Expected width

14 cm

KH

0 - 21 dKH

Species description

The species Alternanthera aquatica is native to the swamps and floodplains of South America, where it grows along the banks or floats on the surface of warm, stagnant bodies of water. In its natural environment, it is typically found in slow-flowing or stagnant waters, such as swamps, ponds, and tropical riverbanks, where it adapts beautifully to seasonal water level variations. This habitat provides a rich organic substrate and consistent, filtered light exposure. The plant's ability to grow both submersed and emersed is a testament to its extraordinary evolutionary resilience in these humid ecosystems. From a taxonomic perspective, the plant belongs to the genus Alternanthera, a taxon celebrated in the Amaranthaceae family for its extraordinary adaptability to amphibious and aquatic environments.

Care, breeding and tankmates

This species prefers warm waters with temperatures between 18 and 30 °C, tolerating wide ranges of hardness (KH 0-21) and a pH from slightly acidic to alkaline (5.0-8.0). Regular water changes are recommended to maintain stable parameters and low levels of pollutants such as nitrates and phosphates. Good mechanical and biological filtration will ensure an environment free of suspended particles, which could settle on the leaves and limit photosynthesis. The main risks include algal infestation on older leaves due to their large surface area, and the stem's tendency to rot if light does not penetrate sufficiently. Under conditions of poor water movement or nutrient imbalance, the leaves can be colonized by filamentous or green spot algae.

Geographic Origin and Distribution

This species originates from: South America.

Origin

Extra-Amazon South America

Plant profile

Placement
Midground

Careful consideration of placement is vital for Alternanthera aquatica in any aquascape layout. Positioning it where it receives medium lighting will yield the best visual results. Ensure there is enough space around it to accommodate its natural growth pattern without shading neighboring plants. Strategic placement will enhance the overall depth and aesthetic of the aquarium.

Botanical form
Stem

Botanically, Alternanthera aquatica exhibits a distinctive stem form that adds unique texture to the tank. Its structural characteristics make it a fascinating subject for dedicated aquatic botanists. The leaf morphology and stem structure are adapted to its specific environmental niche. Observing its natural form develop provides great satisfaction to the careful aquascaper.

Growth
Fast

The growth rate of Alternanthera aquatica is generally considered fast under optimal aquarium conditions. Providing the right balance of light and CO2 can slightly accelerate this pace. Aquarists should be prepared to manage its growth to maintain the desired layout shape. Consistent environmental parameters are key to stable and predictable development.

Substrate
High
Column fertilization
Recommended

Liquid column fertilization is highly beneficial for the sustained health of Alternanthera aquatica. Dosing a comprehensive liquid fertilizer ensures that leaves have direct access to essential minerals. It is recommended to divide the weekly dose into smaller daily additions for better absorption. Adjust the dosage based on the plant's visible response and overall biomass.

Root fertilization
None

Root fertilization plays a significant role in the overall vitality of Alternanthera aquatica. Inserting nutrient-rich root tabs directly into the substrate near its base promotes strong root systems. This is particularly important in mature setups where substrate nutrients may have depleted. A healthy root system anchors the plant securely and supports robust upper growth.

Trimming
Occasional

Regular trimming is required to maintain the desired shape and health of Alternanthera aquatica. Using sharp aquascaping scissors ensures clean cuts that heal quickly without inviting rot. Pruning also encourages denser regrowth and prevents lower portions from being overly shaded. Remove any decaying trimmed leaves promptly to maintain optimal water quality.

Propagation
Cuttings

Propagating Alternanthera aquatica is a rewarding process that allows aquarists to expand their collection. Depending on its stem nature, this is usually achieved by taking healthy cuttings or dividing the rhizome. Ensure that each new segment has sufficient healthy tissue to establish itself. Plant the new propagules carefully to encourage rapid rooting and new growth.

Sensitivity
Moderate

Alternanthera aquatica can be somewhat sensitive to sudden fluctuations in water parameters. It may exhibit signs of stress or melt if exposed to abrupt changes in temperature or pH. Algae treatments containing copper or glutaraldehyde should be used with extreme caution around this plant. Maintaining a stable, clean environment is the best defense against health issues.

Layout role
Midground

In the aquascape, Alternanthera aquatica serves an important role by adding specific structural elements. It can be used to create focal points or to soften the transition between hardscape and open spaces. The plant's unique texture contrasts beautifully with both fine-leaved and broad-leaved neighbors. Thoughtful integration of this species greatly elevates the natural feel of the display.

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

Related species

Recommendations grouped by close relatives, companion choices, and similar care.

Variants and close relatives

Same atlas type, nearby scientific identity, genus, or family.

Alternanthera reineckii 'Grün' ('Green')

Alternanthera reineckii 'Grün' ('Green')

Alternanthera reineckii 'Grün' ('Green')

View details->
Alternanthera reineckii 'Mini'

Alternanthera reineckii 'Mini'

Alternanthera reineckii 'Mini'

View details->
Alternanthera reineckii 'Rosanervig'

Alternanthera reineckii 'Rosanervig'

Alternanthera reineckii 'Rosanervig'

View details->
Alternanthera reineckii 'Rot' ('Red')

Alternanthera reineckii 'Rot' ('Red')

Alternanthera reineckii 'Rot' ('Red')

View details->
Alternanthera reineckii "Kleines Papageienblatt"

Alternanthera reineckii "Kleines Papageienblatt"

Alternanthera reineckii "Kleines Papageienblatt"

View details->
Alternanthera reineckii "Lilacina"

Alternanthera reineckii "Lilacina"

Alternanthera reineckii "Lilacina"

View details->
Alternanthera reineckii "Rosaefolia"

Alternanthera reineckii "Rosaefolia"

Alternanthera reineckii "Rosaefolia"

View details->
Alligator Weed

Alligator Weed

Alternanthera philoxeroides

View details->
Sessile Joyweed

Sessile Joyweed

Alternanthera sessilis

View details->
Alternanthera reineckii "rosaefolia minor"

Alternanthera reineckii "rosaefolia minor"

Alternanthera reineckii "rosaefolia minor"

View details->

Recommended companions

Compatible cards from coherent ecosystems with matching parameters.

Anubias barteri var. nana

Anubias barteri var. nana

Anubias barteri var. nana

View details->
Bacopa monnieri "Rundblättrig"

Bacopa monnieri "Rundblättrig"

Bacopa monnieri "Rundblättrig"

View details->
Orange dwarf crayfish (CPO)
Invertebrate

Orange dwarf crayfish (CPO)

Cambarellus patzcuarensis "Orange"

View details->
Ceratophyllum demersum "Mexiko" ("Rotstängelig")

Ceratophyllum demersum "Mexiko" ("Rotstängelig")

Ceratophyllum demersum "Mexiko" ("Rotstängelig")

View details->
Green babaulti shrimp
Invertebrate

Green babaulti shrimp

Caridina cf. babaulti "Green"

View details->
Caloglossa cf. beccarii

Caloglossa cf. beccarii

Caloglossa cf. beccarii

View details->
Olive nerite snail
Invertebrate

Olive nerite snail

Vitta usnea

View details->
Ceratopteris richardii

Ceratopteris richardii

Ceratopteris richardii

View details->
Malaysian Trumpet Snail
Invertebrate

Malaysian Trumpet Snail

Melanoides tuberculata

View details->
Blue Pearl shrimp
Invertebrate

Blue Pearl shrimp

Neocaridina cf. zhanghjiajiensis "Blue Pearl"

View details->
Red Cherry shrimp
Invertebrate

Red Cherry shrimp

Neocaridina davidi "Red"

View details->
White Pearl / Snowball shrimp
Invertebrate

White Pearl / Snowball shrimp

Neocaridina cf. zhangjiajiensis "White Pearl"

View details->
Yellow Fire shrimp
Invertebrate

Yellow Fire shrimp

Neocaridina davidi "Yellow"

View details->
Ramshorn Snail
Invertebrate

Ramshorn Snail

Planorbella duryi

View details->
Channelled apple snail
Invertebrate

Channelled apple snail

Pomacea canaliculata

View details->
Zebra apple snail
Invertebrate

Zebra apple snail

Asolene spixii

View details->

Similar care

Cards with similar requirements, difficulty, habitat, and husbandry profile.

Aciotis acuminifolia

Aciotis acuminifolia

Aciotis acuminifolia

View details->
Ammannia latifolia

Ammannia latifolia

Ammannia latifolia

View details->
Cabomba aquatica

Cabomba aquatica

Cabomba aquatica

View details->
Commelinaceae sp. "Green"

Commelinaceae sp. "Green"

Commelinaceae sp. "Green"

View details->
Aponogeton rigidifolius

Aponogeton rigidifolius

Aponogeton rigidifolius

View details->
Chlorophytum bichetii

Chlorophytum bichetii

Chlorophytum bichetii

View details->
Anubias "nangi"

Anubias "nangi"

Anubias "nangi"

View details->
Ammannia crassicaulis

Ammannia crassicaulis

Ammannia crassicaulis

View details->
Ammannia pedicellata

Ammannia pedicellata

Ammannia pedicellata

View details->
Cabomba australis

Cabomba australis

Cabomba australis

View details->
Cryptocoryne beckettii "Viridifolia"

Cryptocoryne beckettii "Viridifolia"

Cryptocoryne beckettii "Viridifolia"

View details->
Anubias barteri var. nana 'Golden Heart'

Anubias barteri var. nana 'Golden Heart'

Anubias barteri var. nana 'Golden Heart'

View details->
Azolla mexicana

Azolla mexicana

Azolla mexicana

View details->
Ammannia praetermissa

Ammannia praetermissa

Ammannia praetermissa

View details->
Acorus gramineus

Acorus gramineus

Acorus gramineus

View details->
Red Cabomba

Red Cabomba

Cabomba piauhyensis

View details->
Last updated: 06/16/2026
Alternanthera aquatica Care Guide & Tank Setup | Atlarium