Baka - Tonina sp.

Tonina sp.

Scientific Name: Tonina sp.
Common Name: Tonina
Origin: South America
Family: Eriocaulaceae
Height: 15–40 cm
Growth Rate: Moderate
Placement in Tank: Midground, Background
Light Requirement: Medium to High
CO₂ Requirement: Highly Recommended
Temperature: 20–28°C
pH: 4.5–6.5
Water Hardness: Soft water preferred
Propagation: Stem cuttings / side shoots

Tonina sp. is a distinctive South American aquatic plant prized for its unusual structure, bright fresh-green colour and elegant star-like growth tips. Its narrow leaves grow densely around upright stems, creating a beautifully textured appearance that is quite different from more commonly kept aquarium stem plants.

When grown under the right conditions, Tonina develops dense, vibrant green groups that provide exceptional contrast against red stem plants, darker hardscape and other fine-leaved species.

This is, however, a plant best suited to aquarists who can provide soft, acidic water, stable CO₂, good lighting and consistent nutrition. In the correct environment it can become an exceptional feature plant, but it is less forgiving of unsuitable water parameters than many common aquarium plants.

Key Features:

• Distinctive Star-Shaped Growth Tips: The narrow leaves form attractive rosettes around the growing tips, giving Tonina its characteristic appearance.

• Bright Green Colouration: Its fresh lime-to-bright-green foliage creates excellent contrast against red, bronze and darker green aquarium plants.

• Fine, Elegant Texture: The narrow foliage creates a delicate appearance that works particularly well in detailed aquascapes.

• Excellent Feature Plant: A healthy group of Tonina can become a striking focal point in the midground or background.

• Ideal for Soft-Water Aquariums: This species performs particularly well in soft, acidic water and is an excellent choice for specialised planted aquariums.

Care Requirements:

• Lighting: Medium to high lighting is recommended. Good-quality lighting encourages compact, healthy growth and helps maintain the plant's characteristic dense growing tips.

• CO₂: Consistent CO₂ supplementation is highly recommended. Stable CO₂ is particularly important for maintaining healthy growth and preventing deterioration.

• Water Parameters: Tonina prefers soft, acidic water. A low KH and pH of approximately 4.5–6.5 are ideal. It may struggle in harder, alkaline aquarium water.

• Nutrition: Consistent water-column fertilisation is important. A balanced supply of macro- and micronutrients will support healthy new growth and maintain its bright green colour.

• Substrate: A nutrient-rich aquasoil is particularly well suited to Tonina, especially as many aquasoils also help create the softer, more acidic conditions this plant prefers.

• Trimming: Once stems become too tall, the healthy tops can be trimmed and replanted. Side shoots can also be separated and replanted to gradually create a denser group.

Planting Tips:

• Separate the stems and plant them individually with a small amount of space between each plant to allow sufficient light and water circulation.

• For the best visual effect, plant several stems together to form a defined group rather than scattering individual plants throughout the aquarium.

• Position Tonina in the midground or background where its unusual growth tips and bright green colour can be clearly appreciated.

• Avoid placing it beneath taller plants that may shade the growing tips.

• A quality aquasoil, soft water and stable CO₂ will provide the best foundation for successful long-term growth.

• When trimming, replant the healthiest top portions to maintain an attractive group and gradually replace older lower stems.

• Pair Tonina with red or orange stem plants to create a particularly striking colour contrast.

With its bright green foliage, unusual star-like growth tips and fine texture, Tonina sp. is an exceptional plant for more advanced planted aquariums. While it requires more specific conditions than many common stem plants, aquarists able to provide soft water, good lighting and stable CO₂ are rewarded with a distinctive plant capable of becoming a standout feature in an aquascape.