Dojo Loach: Tank Size, Tank Mates and How Many to Keep

Dojo loaches are long, friendly fish that will eat from your fingers. They become restless before a storm, which earned them the name weather loach.

Adult size
7.9 in20 cm
Smallest tank
55 gallons208 liters
How many
3 or more
Temperature
59–77 °F15–25 °C
pH
6.5–8
Temperament
Peaceful
Swims
On the bottom
Heater needed
No, in a normal room

What size tank do dojo loaches need?

At least 55 gallons (208 liters) for a group of 3. The smallest standard tank that works is the 55 gallon. A bigger tank is always easier to keep stable. We give the size for an adult fish in a proper group, because the small fish in the shop will grow. Scientific name: Misgurnus anguillicaudatus.

How many dojo loaches in each tank size?

This is how many each standard tank carries comfortably if dojo loaches are the only fish in it. Share the tank with other species and the number goes down.

TankHow many dojo loaches
5 gallonToo small
10 gallonToo small
20 gallon longToo small
29 gallonToo small
40 gallon breederToo small
55 gallon3
75 gallonup to 4
125 gallonup to 6

Check dojo loaches against your own tank and other fish

Good to know

  • An escape artist: cover every gap in the lid.
  • Keep at least 3. In smaller numbers they are stressed, or one gets picked on.
  • This is a jumper. Use a lid with no gaps.
  • It prefers cool water. Do not mix it with tropical fish that need a heater.

Tank mates for dojo loaches

These animals like the same water, are a safe size, and have a temper that fits. It is a match on paper: always watch new tankmates for the first week.

Poor matches

  • Betta: Their temperature ranges barely overlap: Dojo loach likes 59–77 °F (15–25 °C), Betta likes 75–82 °F (24–28 °C).
  • Guppy: Dojo loach (about 8 in) can eat guppy (about 2 in).
  • Fancy goldfish: Goldfish do best with other fancy goldfish.
  • Oscar: Oscar is aggressive and will bully or kill peaceful fish such as dojo loach.

Questions and answers

What size tank do dojo loaches need?

At least 55 gallons (208 liters) for a group of 3. The smallest standard tank that works is the 55 gallon. A bigger tank is always easier to keep stable.

How many dojo loaches should be kept together?

At least 3. Dojo loaches are social animals and only behave naturally in a group. More is better if the tank has room.

Can dojo loaches live in a 10 gallon tank?

No. Dojo loach needs at least 55 gallons (208 liters), and grows to 8 in (20 cm), far too long for a 20 inch tank.

What temperature do dojo loaches need?

59–77 °F (15–25 °C), with a pH of 6.5–8. In a normal room that usually means no heater.

Can dojo loaches live with a betta?

It is not a good match. Their temperature ranges barely overlap: Dojo loach likes 59–77 °F (15–25 °C), Betta likes 75–82 °F (24–28 °C).

More fish

Adult size, tank size and water ranges follow the mainstream care consensus (Seriously Fish species profiles and FishBase maximum lengths). Where sources differ we use the more cautious figure. Stocking numbers come from our stocking calculator.