Can Agassiz Cory and Blue Tetra Live Together?
Keeping Agassiz Cory and Blue Tetra together is possible but requires caution due to differing aggression levels. Provide a spacious tank of at least 90 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 Agassiz Cory and Blue 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.
Shared setup supplies
We may earn from qualifying purchases
Behaviour & Temperament
Agassiz Cory is a peaceful species (0/10), while Blue Tetra is moderately assertive (5/10). This notable difference means Blue Tetra may occasionally assert dominance over Agassiz Cory.
In terms of spatial distribution, Agassiz Cory prefers the Bottom (Substrate) zone, whereas Blue Tetra occupies the Top (Surface) and Middle (Open Water) zones. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.
Worth noting: Blue Tetra is a known jumper, so a tight-fitting lid is essential.
To improve the chances of a peaceful coexistence in this community tank: A larger aquarium with ample hiding spots can help diffuse aggression and give the less dominant fish space to retreat. Keep fin nippers in larger groups to distribute nipping behaviour among conspecifics rather than tank mates.
Water Parameters
The safe temperature window for both species falls between 22°C and 26°C. Aim for the midpoint of this range (around 24.0°C) for optimal comfort.
Both fish can tolerate a pH between 6 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 2–12 dGH. Regular testing will ensure conditions stay within this range.
Water care products
We may earn from qualifying purchases
Tank Setup
To house Agassiz Cory and Blue Tetra together, plan for an aquarium of at least 90 litres with a minimum length of 90 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: Sand (Sifters), Plants - Densely covered. 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.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Agassiz Cory and Blue Tetra.
30 Gallon Breeder
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
Show 10 more tank sizes
Feeding products to consider
We may earn from qualifying purchases
.webp?2026-04-25T14%3A35%3A38.022Z)
Frequently Asked Questions
Can Agassiz Cory and Blue Tetra live together?
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 90 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Agassiz Cory and Blue Tetra need?
A minimum of 90 litres (tank length at least 90 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 Agassiz Cory and Blue Tetra together?
Keep the aquarium between 22°C and 26°C. A target of around 24.0°C sits comfortably within both species' preferred ranges.
Are Agassiz Cory or Blue Tetra aggressive?
Agassiz Cory is peaceful (0/10) and Blue Tetra is moderately assertive (5/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Agassiz Cory and Blue Tetra need?
Both species overlap in the 6–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
Will Blue Tetra nip Agassiz Cory's fins?
Blue Tetra is a known fin nipper. If Agassiz Cory has long or flowing fins, there is a real risk of fin damage. Keeping Blue Tetra in a larger group can help redirect nipping behaviour toward conspecifics.
Related Comparisons
Agassiz Cory & Adolfo Cory
·
Agassiz Cory & Asher Cory
·
Agassiz Cory & Bandit Cory
·
Agassiz Cory & Bearded Cory
·
Agassiz Cory & Black Corydoras
·
Agassiz Cory & Bristlenose Pleco
·
Blue Tetra & African Pike
·
Blue Tetra & Black Pacu
·
Blue Tetra & Black Skirt Tetra
·
Blue Tetra & Blind Cave Tetra
·
Blue Tetra & Buenos Aires Tetra
·
Blue Tetra & Colombian Tetra
·