Can Empire Gudgeon and Gertrude's Spotted Blue-eye Live Together?
Keeping Empire Gudgeon and Gertrude's Spotted Blue-eye together is possible but requires caution due to potential behavioral clashes. Provide a spacious tank of at least 132 litres with plenty of hiding spots to reduce stress. Monitor behaviour closely, especially during the first few weeks.
At a Glance
Behaviour & Temperament
Empire Gudgeon is a generally mild-mannered species (3/10), while Gertrude's Spotted Blue-eye is peaceful (2/10). This modest difference means Empire Gudgeon may occasionally assert dominance over Gertrude's Spotted Blue-eye.
Empire Gudgeon and Gertrude's Spotted Blue-eye 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.
Additional behavioural considerations to keep in mind: Shrimp eaters may also prey on very small nano fish.
Worth noting: Empire Gudgeon is a known jumper, so a tight-fitting lid is essential.
Water Parameters
The safe temperature window for both species falls between 21°C and 28°C. Aim for the midpoint of this range (around 24.5°C) for optimal comfort.
Both fish can tolerate a pH between 6.5 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 5–15 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.
Tank Setup
To house Empire Gudgeon and Gertrude's Spotted Blue-eye together, plan for an aquarium of at least 132 litres with a minimum length of 90 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.
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, Driftwood (Digestion/Hiding), Sand (Sifters), 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.
Find the right tank equipment
Browse tanks, décor, and equipment suited for this setup.
Diet & Feeding
Feeding time deserves special attention with this pairing. Empire Gudgeon is a known shrimp eater and may prey on small invertebrates or nano fish like Gertrude's Spotted Blue-eye.
Frequently Asked Questions
Can Empire Gudgeon and Gertrude's Spotted Blue-eye live together?▾
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 132 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Empire Gudgeon and Gertrude's Spotted Blue-eye need?▾
A minimum of 132 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 Empire Gudgeon and Gertrude's Spotted Blue-eye together?▾
Keep the aquarium between 21°C and 28°C. A target of around 24.5°C sits comfortably within both species' preferred ranges.
Are Empire Gudgeon or Gertrude's Spotted Blue-eye aggressive?▾
Empire Gudgeon is generally mild-mannered (3/10) and Gertrude's Spotted Blue-eye is peaceful (2/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Empire Gudgeon and Gertrude's Spotted Blue-eye need?▾
Both species overlap in the 6.5–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
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