Glowlight Tetra (2.5cm) are vibrant juvenile schooling fish known for their signature neon-orange lateral stripe that glows under aquarium lighting. Peaceful, hardy, and visually striking in groups, they’re a favorite for planted community tanks.

🌿 Species Overview

• Scientific Name: Hemigrammus erythrozonus

• Common Name: Glowlight Tetra

• Current Size: ~2.5 cm

• Adult Size: 3.5–4 cm

• Origin: Guyana, South America

• Temperament: Peaceful, schooling

At 2.5cm, these juveniles are already showing strong stripe definition and will intensify in color as they mature.

🎨 Appearance

• Transparent silver body

• Bright orange-red glowing stripe from nose to tail

• Subtle red edging on dorsal fin

• Best coloration under dark substrate and soft lighting

When kept in schools, the glowing stripe effect becomes much more dramatic.

🐟 Behavior & Compatibility

• Must be kept in groups of 6 or more (10+ recommended)

• Ideal for peaceful community tanks

• Compatible with rasboras, small barbs, dwarf cichlids, Corydoras

• Avoid large or aggressive predators

They are active mid-water swimmers and feel safest in numbers.

💧 Ideal Water Parameters

• Temperature: 24–28°C

• pH: 5.5–7.5

• Hardness: Soft to moderately soft

• Water Flow: Gentle to moderate

• Weekly partial water changes recommended

They adapt well but show best coloration in slightly soft, slightly acidic water.

🏡 Tank Setup

• Minimum Tank Size: 60 liters

• Planted aquarium preferred

• Dark substrate enhances glow effect

• Floating plants reduce stress

• Open swimming space in mid-water zone

Under LED lighting, their stripe truly “glows.”

🍽 Feeding

• Micro pellets or fine flakes

• Frozen daphnia, baby brine shrimp

• Occasional live microfoods

Feed small amounts 1–2 times daily.

📈 Care Level

• Difficulty: Easy

• Hardy and beginner-friendly

• Suitable for planted aquascapes

🌟 Why Choose 2.5cm Glowlight Tetra?

• Perfect juvenile size for grow-out

• Strong schooling display

• Bright glowing lateral stripe

• Peaceful community species

• Ideal for planted tanks

Glowlight Tetras add movement, color contrast, and a soft neon shimmer to community aquariums — especially when kept in larger schools