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About H.C. Cuba

H.C. Cuba (Hemianthus callitrichoides 'Cuba') is one of the most iconic and sought-after carpeting plants in the aquascaping hobby. Famous for its tiny, vibrant green leaves and dense, lush carpet, it is widely regarded as one of the finest foreground plants for Nature Aquariums, Iwagumi layouts, and competition-style aquascapes.

Originally discovered growing on limestone rocks near Las Pozas, Cuba, this delicate plant forms a tight, low-growing carpet that creates the illusion of a miniature underwater lawn. Under strong lighting and stable CO₂ injection, H.C. Cuba spreads rapidly by producing horizontal runners, eventually covering the foreground with a thick, vibrant green mat.

Its compact growth provides excellent shelter for shrimp, shrimplets, and microfauna while creating a stunning contrast with rocks, driftwood, and taller background plants. Due to its small leaf size and exceptional visual impact, H.C. Cuba remains a favourite among professional aquascapers worldwide.

H.C. Cuba performs best in nutrient-rich aquasoils with high lighting, stable CO₂ injection, and regular fertilisation. While it can be grown without CO₂, growth will be significantly slower and maintaining a dense carpet becomes much more challenging.

Elegant, vibrant, and highly rewarding, H.C. Cuba is the ultimate carpeting plant for premium planted aquariums.

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Quick Care Guide

Scientific Name

Hemianthus callitrichoides 'Cuba'

Common Name

H.C. Cuba

Origin

Cuba

Plant Type

Carpeting Plant

Growth Rate

Moderate to Fast (with CO₂)

Difficulty

Intermediate to Advanced

Lighting

High

CO₂ Required

Yes (Highly Recommended)

Temperature

20–28°C

pH

5.5–7.5

Water Hardness

1–10 dGH

Placement

Foreground

Suitable For

Nature aquariums, Iwagumi layouts, Dutch aquascapes, shrimp tanks, nano aquariums, and high-tech planted aquariums

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Frequently Asked Questions

Does H.C. Cuba require CO₂?

For the best results, yes. H.C. Cuba performs significantly better with stable CO₂ injection, producing a dense, healthy carpet with rapid horizontal growth.

Is H.C. Cuba difficult to grow?

It is considered an intermediate to advanced plant. While not impossible for beginners, it requires strong lighting, nutrient-rich substrate, and stable CO₂ to achieve its signature carpet.

How do I plant H.C. Cuba?

Separate the plant into small plugs and plant each section a few centimetres apart using aquascaping tweezers. The plant will spread naturally by producing runners.

How long does it take to form a carpet?

Under ideal conditions, H.C. Cuba typically begins spreading within a few weeks and can form a dense carpet in approximately 6–12 weeks, depending on lighting, CO₂, and fertilisation.

Is H.C. Cuba suitable for shrimp tanks?

Absolutely. Its dense carpet provides excellent grazing surfaces for biofilm and offers ideal shelter for shrimplets and other small aquarium inhabitants.

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Common Mistakes

Insufficient CO₂

Low or unstable CO₂ is one of the most common reasons for poor growth, melting, and algae development.

Weak lighting

H.C. Cuba requires high lighting to remain compact. Low light often results in sparse, upward growth instead of a dense carpet.

Planting large clumps

Always divide tissue culture or potted plants into small portions before planting. This encourages faster spreading and more even carpet formation.

Poor nutrient availability

Use a quality nutrient-rich aquasoil and maintain a regular fertilisation schedule to support healthy growth.

Neglecting trimming

Once established, occasional trimming keeps the carpet dense, healthy, and prevents lower layers from deteriorating.