Can Apistogramma uaupesi and Cuban Gar Live Together?

Apistogramma uaupesi is a moderately assertive species (5/10), while Cuban Gar is moderately assertive (6/10). This modest difference means Cuban Gar may occasionally assert dominance over Apistogramma uaupesi.

In terms of spatial distribution, Apistogramma uaupesi prefers the Bottom (Substrate) zone, whereas Cuban Gar 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: Cuban Gar is a known jumper, so a tight-fitting lid is essential.

The safe temperature window for both species falls between 24°C and 29°C. Aim for the midpoint of this range (around 26.5°C) for optimal comfort.

The pH requirements of Apistogramma uaupesi (4–6) and Cuban Gar (6.5–8) do not overlap, making it impossible to satisfy both species simultaneously.

Hardness requirements are incompatible: Apistogramma uaupesi needs 0–5 dGH while Cuban Gar requires 8–20 dGH.

To house Apistogramma uaupesi and Cuban Gar together, plan for an aquarium of at least 3785 litres with a minimum length of 300 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, Smooth Gravel (Sensitive Barbels). 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.

Apistogramma uaupesi and Cuban Gar are the kind of pair that can look acceptable in a shop but become a maintenance problem at home. The main risk is not a single number in the chart; it is the way incompatible behavior, water needs, or pressure on space compounds over time once both fish are established in the same tank.