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Micranthemum tweediei
Micranthemum tweediei
Micranthemum tweediei, widely known as 'Monte Carlo', is a highly sought-after foreground plant that forms a lush, dense carpet in aquariums. Its medium growth rate makes it manageable for aquascapers aiming for a pristine, manicured look.
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20 - 28 °C
5 - 7
Freshwater
Medium to High
High
3 cm
15 cm
2 - 12 dKH
Species description
Micranthemum tweediei originates from South America, specifically found in the riverine regions of Brazil and Argentina. In its natural habitat, it typically thrives submerged or semi-submerged along the banks of clear, slow-moving rivers and streams. This adaptability to both emersed and submersed conditions highlights its resilience and versatility in an aquarium environment. A member of the Linderniaceae family, Micranthemum tweediei shares kinship with several other popular aquatic plants. This botanical classification distinguishes it from the often-compared Hemianthus callitrichoides 'Cuba', despite both being commonly used for carpeting purposes.
Care, breeding and tankmates
Micranthemum tweediei thrives in water temperatures ranging from 20 to 28 °C, a slightly acidic to neutral pH (5.0-7.0), and carbonate hardness (KH) between 2.0 and 12.0. Maintaining stable parameters is vital, as significant fluctuations can cause stress to the plant. Clean, well-oxygenated water is preferred to support its healthy growth. While generally robust, Micranthemum tweediei can be susceptible to algal outbreaks, especially under conditions of nutrient imbalance or excessive lighting without adequate CO2. Nutrient deficiencies can manifest as yellowing or shrinking leaves, while poor water circulation can lead to debris accumulation and localized issues within the carpet.
Geographic Origin and Distribution
This species originates from: South America (Brazil, Argentina).
Origin
Plant profile
- Placement
- Foreground
- Botanical form
- runner
- Growth
- Medium
- Substrate
- High
- Column fertilization
- Recommended
- Root fertilization
- Recommended
- Trimming
- Occasional
- Propagation
- Cuttings
- Sensitivity
- Moderate
- Layout role
- Foreground
It is classically used as a foreground carpeting plant in modern aquascapes. Planting it in small, dispersed portions encourages quick lateral spread. It is also effective when allowed to drape over rocks or driftwood.
It features creeping stems adorned with small, rounded, light-green leaves. It creates a dense and cohesive mat over the aquarium floor. The root structure is shallow, making it ideal for soft, fine substrates.
The plant exhibits a moderate to fast growth rate under optimal conditions. High lighting and CO2 injection are necessary to achieve rapid carpeting. In lower light, its growth slows significantly and tends to become leggy.
Liquid fertilization provides the necessary nutrients for its rapid development. Regular dosing of macro and micro elements prevents the leaves from turning pale. It is highly efficient at absorbing nutrients directly from the water.
While it feeds heavily from the water column, planting in nutrient-rich aquasoil yields the best results. Root tabs can be added periodically to replenish depleted substrates. A fine-grained soil helps its delicate roots take hold securely.
Trimming should be done regularly to keep the carpet thin and firmly rooted. If the mat grows too thick, the lower portions may die from lack of light, leading to detachment. Use curved scissors for an even, horizontal cut.
Propagation is easily achieved by taking stem cuttings or dividing the carpet. Replanting small clumps will quickly result in new runners. It naturally propagates by spreading laterally across the substrate.
It can be prone to algae growth on its small leaves if the aquarium is unbalanced. It requires stable water parameters and may melt if subjected to sudden changes. Good water circulation is essential to keep the carpet free of detritus.
Its primary function is to form a beautiful, vibrant green carpet in the foreground. It softens the hardscape edges and creates a cohesive look. It is often used in Iwagumi layouts to simulate a grassy meadow.
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.
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Similar care
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