Can Apistogramma elizabethae and Guppy Live Together?
Apistogramma elizabethae and Guppy are not recommended as tank mates due to conflicting pH requirements and incompatible hardness ranges. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.
At a Glance
Can your tank handle Apistogramma elizabethae and Guppy?
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.
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Behaviour & Temperament
Apistogramma elizabethae is a moderately assertive species (5/10), while Guppy is peaceful (1/10). This notable difference means Apistogramma elizabethae may occasionally assert dominance over Guppy.
In terms of spatial distribution, Apistogramma elizabethae prefers the Bottom (Substrate) zone, whereas Guppy 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.
Additional behavioural considerations to keep in mind: Hyperactive swimmers can stress shy, slow-moving species through constant motion.
Water Parameters
The safe temperature window for both species falls between 24°C and 28°C. Aim for the midpoint of this range (around 26.0°C) for optimal comfort.
The pH requirements of Apistogramma elizabethae (4–6.5) and Guppy (7–8.5) do not overlap, making it impossible to satisfy both species simultaneously.
Hardness requirements are incompatible: Apistogramma elizabethae needs 0–5 dGH while Guppy requires 8–30 dGH.
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Tank Setup
To house Apistogramma elizabethae and Guppy together, plan for an aquarium of at least 55 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.
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: Sand (Sifters), Leaf Litter/Blackwater, Driftwood (Digestion/Hiding), 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.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Apistogramma elizabethae and Guppy.
15 Gallon Standard
20 Gallon High
20 Gallon Long
29 Gallon Standard
30 Gallon Breeder
36 Gallon Bowfront
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Frequently Asked Questions
Can Apistogramma elizabethae and Guppy live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Apistogramma elizabethae and Guppy need?
A minimum of 55 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 Apistogramma elizabethae and Guppy together?
Keep the aquarium between 24°C and 28°C. A target of around 26.0°C sits comfortably within both species' preferred ranges.
Are Apistogramma elizabethae or Guppy aggressive?
Apistogramma elizabethae is moderately assertive (5/10) and Guppy is peaceful (1/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Apistogramma elizabethae and Guppy need?
Their pH requirements do not overlap. Apistogramma elizabethae prefers 4–6.5, while Guppy needs 7–8.5. This makes them incompatible in the same water chemistry.
How do I manage Apistogramma elizabethae's territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Apistogramma elizabethae space to claim a territory without encroaching on the other fish's area. Adding décor that divides the tank into distinct zones works especially well.
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