Can Delicate Blue-Eye and Neon Tetra Live Together?
Keeping Delicate Blue-Eye and Neon Tetra together is possible but requires caution, though some care is needed. Provide a spacious tank of at least 60 litres with plenty of hiding spots to reduce stress. Monitor behaviour closely, especially during the first few weeks.
At a Glance
Can your tank handle Delicate Blue-Eye and Neon Tetra?
Compatibility is only part of the answer. Test both fish with your real tank size, current stock, and maintenance needs to see if you have enough space and a safe stocking level before you add them.
Behaviour & Temperament
Both Delicate Blue-Eye and Neon Tetra are peaceful species with an aggression score of 1/10. Their matching temperaments mean neither fish is likely to dominate the other in a shared aquarium.
Delicate Blue-Eye and Neon Tetra both frequent the Middle (Open Water) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.
Worth noting: Delicate Blue-Eye is a known jumper, so a tight-fitting lid is essential.
Water Parameters
The safe temperature window for both species falls between 25°C and 26°C. Aim for the midpoint of this range (around 25.5°C) for optimal comfort.
Both fish can tolerate a pH between 5 and 7.5. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 5–10 dGH. Regular testing will ensure conditions stay within this range.
Tank Setup
To house Delicate Blue-Eye and Neon Tetra together, plan for an aquarium of at least 60 litres with a minimum length of 60 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.
Because this pairing requires extra vigilance, include plenty of hiding spots — caves, driftwood, and dense plant clusters — so the less dominant fish can retreat when needed.
Specific environmental needs for this combination include: Plants - Densely covered, Plants - Floating, Leaf Litter/Blackwater. Meeting these requirements will help both species thrive.
Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.
Why This Pairing Needs Extra Planning in Practice
This pairing usually fails when the tank is treated like a standard mixed community and the caution flags are ignored. Delicate Blue-Eye and Neon Tetra need extra room, more cover, and closer observation during the first few weeks so small aggression, feeding, or territory issues do not snowball into a long-term problem.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Delicate Blue-Eye and Neon Tetra.
20 Gallon High
20 Gallon Long
29 Gallon Standard
30 Gallon Breeder
36 Gallon Bowfront
40 Gallon Breeder
Show 19 more tank sizes
Frequently Asked Questions
Can Delicate Blue-Eye and Neon Tetra live together?
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 60 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Delicate Blue-Eye and Neon Tetra need?
A minimum of 60 litres (tank length at least 60 cm) is recommended. This provides enough space for both species to establish their own areas and reduces the likelihood of territorial disputes.
What water temperature is best for Delicate Blue-Eye and Neon Tetra together?
Keep the aquarium between 25°C and 26°C. A target of around 25.5°C sits comfortably within both species' preferred ranges.
Are Delicate Blue-Eye or Neon Tetra aggressive?
Delicate Blue-Eye is peaceful (1/10) and Neon Tetra is peaceful (1/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Delicate Blue-Eye and Neon Tetra need?
Both species overlap in the 5–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
Shared setup supplies
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Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- May 4, 2026
- Last updated
- May 4, 2026
- Issues or corrections?
- Contact the editorial team
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