Can Guppy and Red Rainbowfish Live Together?
Yes, Guppy and Red Rainbowfish are ideal tank mates. Both species share compatible water parameters and peaceful temperaments, making them well-suited for a community aquarium. A minimum tank size of 240 litres is recommended.
At a Glance
Behaviour & Temperament
Guppy is a peaceful species (1/10), while Red Rainbowfish is generally mild-mannered (3/10). This modest difference means Red Rainbowfish may occasionally assert dominance over Guppy.
Guppy and Red Rainbowfish both frequent the Top (Surface) and 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: Red Rainbowfish is a known jumper, so a tight-fitting lid is essential.
Water Parameters
The safe temperature window for both species falls between 22°C and 28°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.
Both fish can tolerate a pH between 7 and 8.5. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 10–25 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.
Tank Setup
To house Guppy and Red Rainbowfish together, plan for an aquarium of at least 240 litres with a minimum length of 120 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.
Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.
Specific environmental needs for this combination include: Plants - Densely covered, Plants - Floating. Meeting these requirements will help both species thrive.
Both species do well with low (still water) water movement, so a standard filtration setup rated for the tank volume should suffice.
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Frequently Asked Questions
Can Guppy and Red Rainbowfish live together?▾
Yes. Guppy and Red Rainbowfish are considered ideal tank mates. Their water parameters, temperaments, and behaviour profiles are well matched for a community aquarium.
What size tank do Guppy and Red Rainbowfish need?▾
A minimum of 240 litres (tank length at least 120 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 Guppy and Red Rainbowfish together?▾
Keep the aquarium between 22°C and 28°C. A target of around 25.0°C sits comfortably within both species' preferred ranges.
Are Guppy or Red Rainbowfish aggressive?▾
Guppy is peaceful (1/10) and Red Rainbowfish is generally mild-mannered (3/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Guppy and Red Rainbowfish need?▾
Both species overlap in the 7–8.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
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