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Bacopa crenata

Bacopa crenata

A beautiful foreground to midground plant native to Africa, featuring unique scalloped leaf margins and a slow growth rate perfect for compact nano tanks.

Taxonomy
Class:Liliopsida
Order:Lamiales
Family:Plantaginaceae
Genus:Bacopa
Species:Bacopa crenata

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Water Temperature

20 - 30 °C

pH Value

5 - 7

Water type

Freshwater

Light

High

CO2

Low - High

Expected height

20 cm

Expected width

4 cm

KH

0 - 7 dKH

Species description

Geographical Origin and Habitat: The species Bacopa crenata is native to the tropical and wet areas of Africa, where it grows along the muddy banks of rivers and ponds exposed to strong sunlight. 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.
Taxonomy & Genetics: From a taxonomic perspective, the plant belongs to the Plantaginaceae family, genus Bacopa. It is distinguished by its finely scalloped or crenated leaf margins. This phylogenetic placement places it within a group of vascular plants highly specialized for aquatic life. Genetically, species in this genus exhibit high phenotypic plasticity, meaning their outward appearance can vary drastically based on available light and nutrient conditions. Selection and hybridization efforts have led to the development of specific cultivars suited for aquarium cultivation.
Physical Structure: The morphology of this plant is characterized by erect or creeping stems with opposite, sessile, slightly fleshy leaves characterized by a rounded shape and crenated edges. This structural conformation allows the plant to withstand moderate water currents and maximize the absorption of carbon dioxide and light. The root system is designed to anchor the plant firmly to the soil and absorb mineral nutrients. In aquariums, the vertical or creeping development provides excellent natural barriers and shelter zones for small fish and invertebrates.
Color & Texture: Aesthetically, the plant offers a bright, uniform light green color, which is highly decorative and offers a fresh, clean appearance in aquascaping layouts. The leaf texture, soft yet resilient to the touch, adds visual depth and a sense of naturalness to any aquascaping composition. The chromatic variation serves as an excellent color contrast compared to traditional, all-green plants. Under strong lighting and targeted fertilization, the intensity of the color reaches its maximum visual splendor.

Care, breeding and tankmates

Lighting & CO2: For optimal growth, the plant requires intense lighting to prevent stretching of internodes and CO2 to promote steady growth and compact leaf development. Intense light promotes shorter internodes and the development of more saturated colors, while the CO2 supply ensures stable photosynthesis, preventing plant tissue decay. In the absence of these elements, the plant will tend to stretch excessively towards the light, losing its lower leaves and exhibiting weak, stunted growth.
Nutrition & Substrate: Nutrition must be managed by providing balanced nutrition both at the roots and in the
Water Chemistry: This species prefers soft and slightly acidic water with pH between 5.0 and 7.0, KH 0-7, and temperatures between 20 and 30 °C for optimal development. 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.
Space Management & Placement: The ideal placement is the foreground or midground in dense groups, where its slow growth rate allows the layout to remain neat and tidy for longer. As a plant that can expand laterally or vertically, it is important to carefully calculate distances from neighboring species to avoid mutual shading. Proper water circulation among the foliage also prevents the formation of stagnant zones susceptible to bacterial infections.
Pruning: Maintenance is carried out by gently shortening the stems and replanting the cuttings, an operation that should be performed infrequently given the species' slow growth. Periodically removing older or damaged leaves at the base stimulates the plant to focus energy on new growth. Using sterile, very sharp tools is essential to avoid crushing stem tissues, which could lead to necrosis or fungal infections.
Risks & Diseases: The main risks include the onset of green spot algae on the leaves due to its slow growth rate, and stem decay if shaded by faster-growing plants. Under conditions of poor water movement or nutrient imbalance, the leaves can be colonized by filamentous or green spot algae. In cases of severe stress, the stems can rot from the inside; if this occurs, damaged parts must be removed immediately to prevent infecting the entire plant.

Geographic Origin and Distribution

The species Bacopa crenata is native to the tropical and wet areas of Africa, where it grows along the muddy banks of rivers and ponds exposed to strong sunlight. 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.

Origin

Africa and Madagascar

Plant profile

Placement
Foreground
It is best positioned in the midground of the aquarium, where its height can be easily managed. Grouping several stems together creates an attractive, focal bush. Its straight, upright growth nicely complements harder aquascape elements like wood and stone.
Botanical form
Stem
It features distinctively serrated or scalloped leaf edges, setting it apart from other Bacopa species. The leaves are light green, opposite, and somewhat delicate in texture. Stems are relatively thin but rigid enough to maintain an upright posture.
Growth
Slow
This species grows at a moderate pace, making it easy to manage without frequent pruning. It establishes quickly once planted and acclimates well to submerged conditions. The moderate growth ensures it does not easily overshadow slower-growing foreground plants.
Substrate
Medium
Bacopa crenata benefits from a moderately nutrient-rich substrate, such as a quality aqua soil or a gravel bed supplemented with root tabs. Its roots penetrate the substrate to a moderate depth, establishing a robust anchor that supports the plant's leafy stems and absorbs essential minerals. A substrate layer of at least 4 to 6 centimeters is recommended to ensure the root system has ample space to expand and extract sustenance. Providing a fertile base helps maintain the vibrant green coloration and overall vitality of this elegant stem plant.
Column fertilization
Recommended
Liquid fertilization is beneficial as it readily absorbs nutrients directly from the water column. Providing adequate iron and micronutrients prevents the young leaves from turning pale. Regular weekly dosing maintains strong, vibrant new growth.
Root fertilization
None
While a nutrient-rich substrate is beneficial, it is not absolutely necessary. Root tabs can be added near the base to boost early development. The roots serve mainly as anchors but will supplement nutrient intake if the column is lean.
Trimming
Occasional
Trim by cutting the top portion of the stem with sharp aquascaping scissors. Replanting the tops will quickly form a denser patch. The remaining lower stems will branch out, adding volume to the plant group.
Propagation
Cuttings
Propagation is straightforward via stem cuttings. Simply cut healthy stems and insert them an inch deep into the substrate. They will form roots within a week and continue growing.
Sensitivity
Moderate
It is quite hardy and adapts well to various water hardness and pH levels. However, it can melt if exposed to sudden, drastic shifts in water parameters. It handles typical algae treatments well when dosed according to instructions.
Layout role
Nano, Midground, Foreground, group
It provides excellent textural contrast due to its crenated leaf edges. Often used as a midground transitional plant between carpet plants and taller background species. Its bright green coloration softens the transitions between dark hardscape and red plants.

Image gallery

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

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Last updated: 06/30/2026
Bacopa crenata Care Guide & Tank Setup | Atlarium