Description
The Diamond Head Rummy nose Tetra (Hemigrammus bleheri var. “Diamond Head”) is a vibrant and active schooling fish, known for its bright red nose, striking silver body, and iridescent patch on the head that reflects like a diamond under aquarium lighting. This selectively bred variant of the classic Rummy nose Tetra combines the species' renowned tight schooling behavior with enhanced visual appeal. Ideal for planted community aquariums, the Diamond Head Rummy nose is both peaceful and visually captivating when kept in large groups.
Features of the Diamond Head Rummy nose Tetra
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Reaches up to 4.5 cm in length
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Bright red nose, silver body, and “diamond” reflective patch on the forehead
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Displays bold black-and-white striped tail fin
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Peaceful, highly social; best kept in schools of 8 or more
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Lifespan of 5–6 years in well-maintained conditions
The best aquarium size for the Diamond Head Rummy nose Tetra
A minimum of 80 litres is recommended for a school of 8–10 individuals. These fish are highly active swimmers and need horizontal space to exhibit natural schooling behavior. Larger groups will display more confidence and cohesion.
Tank Mate Compatibility for the Diamond Head Rummy nose Tetra
This species thrives in peaceful community tanks alongside other small, non-aggressive fish. Suitable tank mates include:
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Neon Tetras
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Harlequin Rasboras
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Corydoras Catfish
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Dwarf Gourami
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Otocinclus Catfish
Diet for the Diamond Head Rummy nose Tetra
Omnivorous and not picky, this tetra should be offered a high-quality, varied diet:
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Micro pellets and tropical flakes
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Frozen foods such as daphnia, bloodworms, and brine shrimp
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Occasional live foods for enrichment
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Crushed vegetable flakes or blanched greens for dietary balance
Feed small portions 1–2 times daily, ensuring no excess food remains.
Aquarium Setup Diamond Head Rummy nose Tetra
Aquarium Filtration
Use a gentle, high-efficiency filter such as a sponge or external canister filter. Ensure stable, clean water with minimal surface agitation, as the species prefers calmer waters.
Aquarium Plants
Heavily planted tanks are ideal. Use species such as Amazon swords, Cryptocoryne, and Java fern. Floating plants help diffuse light and create a more natural environment.
Aquarium Lighting
Moderate lighting brings out the iridescence of the “diamond head” without stressing the fish. Avoid harsh lighting in tanks with limited plant cover.
Aquarium Heating
Keep the water temperature between 23°C and 27°C. Use a reliable heater and digital thermometer to maintain stable conditions.
Aquarium Substrate
A dark sand or fine gravel substrate enhances coloration and mimics their natural riverbed habitat. It also supports live plant growth and bottom-dwelling companions.
Aquarium Decorations
Incorporate driftwood, smooth stones, and leaf litter to replicate their South American origins. Ensure open areas for swimming, along with sheltered zones to reduce stress.
