Can Butterfly Pleco (L168) and Emerald Dwarf Danio Live Together?

Butterfly Pleco (L168) is a peaceful species (2/10), while Emerald Dwarf Danio is peaceful (1/10). This modest difference means Butterfly Pleco (L168) may occasionally assert dominance over Emerald Dwarf Danio.

Butterfly Pleco (L168) and Emerald Dwarf Danio both frequent the 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.

Worth noting: Butterfly Pleco (L168) is nocturnal and will be most active after lights-out, naturally reducing daytime encounters. Also, Emerald Dwarf Danio is a known jumper, so a tight-fitting lid is essential.

There is no temperature overlap between Butterfly Pleco (L168) (25–28°C) and Emerald Dwarf Danio (20–24°C). This fundamental mismatch makes long-term cohabitation impractical.

Both fish can tolerate a pH between 7 and 7. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 8–10 dGH. Regular testing will ensure conditions stay within this range.

To house Butterfly Pleco (L168) and Emerald Dwarf Danio together, plan for an aquarium of at least 115 litres with a minimum length of 80 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: Driftwood (Digestion/Hiding), Smooth Gravel (Sensitive Barbels), Plants - Densely covered. Meeting these requirements will help both species thrive.

Butterfly Pleco (L168) prefers High (River/Stream) flow while Emerald Dwarf Danio needs Low (Still Water) flow. Consider positioning filter outlets and using baffles to create zones of different current intensity within the same tank.

Butterfly Pleco (L168) and Emerald Dwarf Danio 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.