Rummynose Tetra

Rummynose Tetra Care Guide

The Rummynose Tetra (Hemigrammus rhodostomus and closely related species H. bleheri or Petitella georgiae) is a popular and striking schooling fish known for its bright red nose and contrasting black-and-white striped tail. Peaceful and graceful, it’s a favourite among aquarists for its beauty and active group behaviour.

Tank Requirements

• Tank Size: Minimum 80 L (larger for stable schools)

• Temperature: 24 – 28 °C

• pH: 6.0 – 7.0

• Water Hardness: Soft to moderately soft (2 – 8 dGH)

• Filtration: Gentle, efficient filtration with good oxygenation

• Décor: Dark substrate, driftwood, and live plants to mimic their Amazon habitat

Social Behavior

Rummynose Tetras are true schooling fish — happiest and most confident in groups of 10 or more. Their synchronized swimming and tight schooling behaviour are mesmerizing to watch and also help reduce stress.

️ Diet

They are omnivorous and enjoy:

• High-quality tropical flakes or micro pellets

• Frozen or live foods like daphnia, brine shrimp, and bloodworms

• Occasional vegetable-based foods or spirulina

Feed small amounts 2–3 times per day for optimal health and colour.

Water Quality Tip

Rummynose Tetras are sensitive to poor water conditions. Their red nose colour fades when stressed or exposed to unstable water parameters — a natural “indicator” of your aquarium’s health.

Interesting Fact

The intensity of the Rummynose Tetra’s red nose is not just for show — it’s a natural stress and water quality gauge! When their environment is healthy, their noses glow a vivid crimson, but when stressed or in poor water, it fades — making them the aquarium’s very own “living water testers.” ❤️

Reference: Bubbly Fish – creating underwater wonders.