Green Neon Tetra (Paracheirodon simulans)
Green Neon Tetra (Paracheirodon simulans)
The Green Neon Tetra is a small, schooling South American tetra prized for its subtle, glowing emerald-blue stripe and peaceful nature. It is closely related to the Neon Tetra (P. innesi) but prefers warmer, softer water and remains slightly smaller.
Quick Facts
- Scientific name: Paracheirodon simulans
- Common name: Green Neon Tetra
- Adult size: ~2.5 cm (1 inch)
- Lifespan: 3–5 years (often longer in optimal conditions)
- Temperament: Peaceful, schooling
- Care level: Intermediate
- Origin: Upper Amazon Basin (Brazil, Colombia)
Appearance
- Narrow body with an intense greenish-blue iridescent stripe
- Minimal red coloration compared to Neon or Cardinal Tetras
- Color intensity increases under low lighting and dark substrates
- Smaller and slimmer than Neons (P. innesi)
Tank Requirements
Minimum tank size
- 10 gallons (40 L) for a proper school
- Larger tanks strongly recommended for stability
Water parameters
- Temperature: 25–30 °C (77–86 °F) ❗ warmer than Neons
- pH: 4.5–6.5 (acidic)
- Hardness: Very soft (0–4 dGH)
- Flow: Gentle
- Water quality: Extremely clean; sensitive to ammonia/nitrite
These fish thrive in blackwater-style aquariums.
Aquascaping
Best replicated with:
- Dark substrate (sand or fine gravel)
- Driftwood and leaf litter (Indian almond, oak)
- Dense live plants (Cryptocoryne, Amazon swords, mosses)
- Dim lighting or floating plants
A natural, shaded environment greatly improves coloration and confidence.
Social Behavior
- Must be kept in groups of at least 8–10
- Larger schools = better color and lower stress
- Non-aggressive and shy when kept in small numbers
Good tankmates
- Other small, peaceful fish from soft acidic water
- Ember Tetras
- Pencilfish
- Dwarf Corydoras
- Apistogramma (with care)
- Avoid large or boisterous species
Diet
Omnivore, prefers small foods:
Staple foods
- High-quality micro pellets or flakes
Supplement with
- Baby brine shrimp
- Daphnia
- Cyclops
- Microworms
Feed small amounts 1–2 times daily. Variety enhances color and health.
Breeding (Advanced)
Green Neons are harder to breed than standard Neons.
Key points
- Requires very soft, acidic water (pH ~4.5–5.0)
- Low light or near darkness
- Eggs are light-sensitive
- Adults must be removed after spawning
Most commercially available specimens are wild-caught or farm-raised under controlled conditions.
Common Issues
- Sensitive to poor water quality
- Prone to stress in new or brightly lit tanks
- Not ideal for brand-new aquariums
- Acclimate slowly (drip acclimation recommended)
Green Neon vs Neon Tetra
| Feature | Green Neon | Neon |
|---|---|---|
| Size | Smaller | Slightly larger |
| Temperature | Warmer | Cooler |
| Red stripe | Minimal | Prominent |
| Sensitivity | Higher | Moderate |
Green Neon Tetra is a stunning but slightly more demanding species than the standard Neon Tetra. In a warm, soft, well-maintained aquarium with a proper school, they reward keepers with shimmering, jewel-like coloration and calm, natural behavior.
Green Neon Tetra (Paracheirodon simulans)
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Description
Green Neon Tetra (Paracheirodon simulans)
The Green Neon Tetra is a small, schooling South American tetra prized for its subtle, glowing emerald-blue stripe and peaceful nature. It is closely related to the Neon Tetra (P. innesi) but prefers warmer, softer water and remains slightly smaller.
Quick Facts
- Scientific name: Paracheirodon simulans
- Common name: Green Neon Tetra
- Adult size: ~2.5 cm (1 inch)
- Lifespan: 3–5 years (often longer in optimal conditions)
- Temperament: Peaceful, schooling
- Care level: Intermediate
- Origin: Upper Amazon Basin (Brazil, Colombia)
Appearance
- Narrow body with an intense greenish-blue iridescent stripe
- Minimal red coloration compared to Neon or Cardinal Tetras
- Color intensity increases under low lighting and dark substrates
- Smaller and slimmer than Neons (P. innesi)
Tank Requirements
Minimum tank size
- 10 gallons (40 L) for a proper school
- Larger tanks strongly recommended for stability
Water parameters
- Temperature: 25–30 °C (77–86 °F) ❗ warmer than Neons
- pH: 4.5–6.5 (acidic)
- Hardness: Very soft (0–4 dGH)
- Flow: Gentle
- Water quality: Extremely clean; sensitive to ammonia/nitrite
These fish thrive in blackwater-style aquariums.
Aquascaping
Best replicated with:
- Dark substrate (sand or fine gravel)
- Driftwood and leaf litter (Indian almond, oak)
- Dense live plants (Cryptocoryne, Amazon swords, mosses)
- Dim lighting or floating plants
A natural, shaded environment greatly improves coloration and confidence.
Social Behavior
- Must be kept in groups of at least 8–10
- Larger schools = better color and lower stress
- Non-aggressive and shy when kept in small numbers
Good tankmates
- Other small, peaceful fish from soft acidic water
- Ember Tetras
- Pencilfish
- Dwarf Corydoras
- Apistogramma (with care)
- Avoid large or boisterous species
Diet
Omnivore, prefers small foods:
Staple foods
- High-quality micro pellets or flakes
Supplement with
- Baby brine shrimp
- Daphnia
- Cyclops
- Microworms
Feed small amounts 1–2 times daily. Variety enhances color and health.
Breeding (Advanced)
Green Neons are harder to breed than standard Neons.
Key points
- Requires very soft, acidic water (pH ~4.5–5.0)
- Low light or near darkness
- Eggs are light-sensitive
- Adults must be removed after spawning
Most commercially available specimens are wild-caught or farm-raised under controlled conditions.
Common Issues
- Sensitive to poor water quality
- Prone to stress in new or brightly lit tanks
- Not ideal for brand-new aquariums
- Acclimate slowly (drip acclimation recommended)
Green Neon vs Neon Tetra
| Feature | Green Neon | Neon |
|---|---|---|
| Size | Smaller | Slightly larger |
| Temperature | Warmer | Cooler |
| Red stripe | Minimal | Prominent |
| Sensitivity | Higher | Moderate |
Green Neon Tetra is a stunning but slightly more demanding species than the standard Neon Tetra. In a warm, soft, well-maintained aquarium with a proper school, they reward keepers with shimmering, jewel-like coloration and calm, natural behavior.
Green Neon Tetra (Paracheirodon simulans)
