Can Discus and Silver Flying Fox Live Together?

Discus is a generally mild-mannered species (4/10), while Silver Flying Fox is generally mild-mannered (3/10). This modest difference means Discus may occasionally assert dominance over Silver Flying Fox.

Discus and Silver Flying Fox both frequent the Middle (Open Water) and Bottom (Substrate) 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: Hyperactive swimmers can stress shy, slow-moving species through constant motion. Aggressive eaters may outcompete shy fish for food, leading to malnutrition.

Worth noting: Silver Flying Fox is a known jumper, so a tight-fitting lid is essential.

There is no temperature overlap between Discus (28–32°C) and Silver Flying Fox (20–26°C). This fundamental mismatch makes long-term cohabitation impractical.

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.

To house Discus and Silver Flying Fox together, plan for an aquarium of at least 250 litres with a minimum length of 120 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), Driftwood (Digestion/Hiding), Leaf Litter/Blackwater, Established Algae (Otocinclus), Smooth Gravel (Sensitive Barbels). Meeting these requirements will help both species thrive.

Discus prefers Low (Still Water) flow while Silver Flying Fox needs High (River/Stream) flow. Consider positioning filter outlets and using baffles to create zones of different current intensity within the same tank.

Discus and Silver Flying Fox 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.

Feeding time deserves special attention with this pairing. Silver Flying Fox is an aggressive eater that may prevent Discus from getting enough food.

Because Silver Flying Fox is a fast, competitive feeder, consider using sinking pellets or feeding at opposite ends of the setup to ensure Discus receives an adequate share.