Can Bala Shark and Three Spot Gourami (Blue/Gold/Opaline) Live Together?

Bala Shark is a generally mild-mannered species (3/10), while Three Spot Gourami (Blue/Gold/Opaline) is moderately assertive (6/10). This modest difference means Three Spot Gourami (Blue/Gold/Opaline) may occasionally assert dominance over Bala Shark.

Bala Shark and Three Spot Gourami (Blue/Gold/Opaline) 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.

Worth noting: Bala Shark is a known jumper, so a tight-fitting lid is essential.

To improve the chances of a peaceful coexistence in this community tank: Provide a significantly larger tank (at least 50% more volume than the minimum) to allow both Bala Shark and Three Spot Gourami (Blue/Gold/Opaline) to establish separate territories. Add plenty of line-of-sight breaks using driftwood, rocks, and dense planting to reduce territorial confrontations. Keep fin nippers in larger groups to distribute nipping behaviour among conspecifics rather than tank mates.

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 6 and 8. 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.

To house Bala Shark and Three Spot Gourami (Blue/Gold/Opaline) together, plan for an aquarium of at least 672 litres with a minimum length of 180 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: Smooth Gravel (Sensitive Barbels), Plants - Densely covered, Plants - Floating. Meeting these requirements will help both species thrive.

Bala Shark prefers High (River/Stream) flow while Three Spot Gourami (Blue/Gold/Opaline) needs Low (Still Water) flow. Consider positioning filter outlets and using baffles to create zones of different current intensity within the same tank.