Loaches are a fun addition to any tropical freshwater aquarium. Generally, they are peaceful scavengers that spend their time rooting about for tidbits of food on the bottom. Many loach species actually prefer to be kept in schools, and some species will literally pine away with loneliness if kept alone.

  • 01
  • of 06
  • Clown Loach
  • Timothy Paine
  • Scientific Name: Chromobotia macracanthus
  • Also Known As: Tiger Loach
  • Adult Size: 12 inches (30 cm)
  • Lifespan: 15+ years
  • Minimum Tank Size: 20 gallon
  • pH: 6.5–7.0
  • Hardness: 5–12 dGH
  • Temperature: 75–86 Fahrenheit (24-30 Celsius)
  • Tankmates: Keep with others of its own kind.
  • Easily the most recognizable of the Loach family, clown loaches are active and colorful fish, but they can grow to be quite large over time. They are best suited for larger tanks of 55 gallons or more because they thrive in schools. (A single specimen can be kept in a smaller tank, but for the health of the fish, this is not recommended.)
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  • of 06
  • Kuhli Loach
  • Robert Mollik
  • Scientific Name: Pangio kuhlii
  • Also Known As: Coolie Loach, Prickly Eye
  • Adult Size: 4 inches (12 cm)
  • Lifespan: 10 years
  • Minimum Tank Size: 15 gallon
  • pH: 6.0–6.5
  • Hardness: 1–10 dGH (5 dGH is preferred)
  • Temperature: 75–86 Fahrenheit (24-30 Celsius)
  • Tankmates: Keep in schools with small peaceful fish.
  • Kuhlis are more active at night. During the day it’s quite common for them to find a cozy spot and remain hidden until dark. Like all other loaches, they are happiest when in the company of a school of their own kind. Cover all filter intakes well, as this species has been known to find its way into impellers.
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  • of 06
  • Horsehead Loach
  • Alter welt
  • Scientific Name: Acantopsis dialuzona
  • Also Known As: Banana Fish, Horseface Loach, Long-Faced Loach, Long-Nosed Loach
  • Adult Size: 12 inches (30 cm)
  • Lifespan: 10 years
  • Minimum Tank Size: 15 gallon
  • pH: 6.0–6.5
  • Hardness: 1–10 dGH (5 dGH is preferred)
  • Temperature: 40–77 Fahrenheit (4–25 Celsius)
  • Tankmates: Peaceful with any fish
  • This loach truly does have a head that is distinctly horse-shaped. It is also a shy loach; aquarists often don’t see them for days at a time. They love to burrow below the substrate with just their eyes protruding to keep an eye out for food or predators. One way to be sure to see them is to turn off the lights in the evening and drop a few sinking food tablets in the tank. Fitting the tank with a moonlight will also make the horsehead loach easier to see.
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  • of 06
  • Weather Loach
  • Bernt Rene Voss Grimm
  • Scientific Name: Misgurnus angullicaudatus
  • Also Known As: Amur Mud loach, Dojo Loach, Japanese Loach, Japanese Weatherfish, Oriental Weatherfish, Pond Loach
  • Adult Size: 12 inches (30 cm)
  • Lifespan: 10 years
  • Minimum Tank Size: 30 gallon
  • pH: 6.0–8.0
  • Hardness: 1–12 dGH (5 dGH is preferred)
  • Temperature: 64–75 Fahrenheit (18–24 Celcius)
  • Tankmates: Peaceful schooling fish
  • Weather loaches are known for their sensitivity to changes in barometric pressure. They are active fish, but when weather changes take place, they become even more active. This species is one of the few loaches that do not need to be kept in a school. They get along well with virtually all other fish and provide plenty of action for the tank.
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  • of 06
  • Yoyo Loach
  • Fanche
  • Scientific Name: Botia lohachata
  • Also Known As: Almorha Loach, Pakistani Loach, Reticulated Loach, Y-Loach
  • Adult Size: 3–5 inches (7–13 cm)
  • Lifespan: 10 years
  • Minimum Tank Size: 20 gallon
  • pH: 6.5–7.5
  • Hardness: 1–12 dGH (5 dGH is preferred)
  • Temperature: 75–86 Fahrenheit (24–30 Celsius)
  • Tankmates: Peaceful schooling fish
  • Yoyo loaches proudly sport their name on their sides. They are active, personable fish that often learns to recognize their owner. Like other loaches, they prefer to be kept in schools and can be shy until they become comfortable with their habitat.
  • 06
  • of 06
  • Zebra Loach
  • M. Agullo
  • Scientific Name: Botia striata
  • Also Known As: Candystripe Loach, Crossbanded Loach, Lined Loach, Striped Loach, Tiger Loach, Zebra Botia
  • Adult Size: 4 inches (10 cm)
  • Lifespan: 10+ years
  • Minimum Tank Size: 20 gallon
  • pH: 6.0–6.5
  • Hardness: 1–10 dGH (5 dGH is preferred)
  • Temperature: 73–79 Fahrenheit (23–26 Celsius)
  • Tankmates: Peaceful schooling fish, comfortable with all species
  • Zebra loaches are easily recognized by their many vertical bands that even cross over onto their fins. They are one of the smallest members of the loach family, and their smaller size and peaceful nature make them a good candidate for many community aquariums.

Clown Loach

Scientific Name: Chromobotia macracanthus

Also Known As: Tiger Loach

Adult Size: 12 inches (30 cm)

Lifespan: 15+ years

Minimum Tank Size: 20 gallon

pH: 6.5–7.0

Hardness: 5–12 dGH

Temperature: 75–86 Fahrenheit (24-30 Celsius)

Tankmates: Keep with others of its own kind.

Easily the most recognizable of the Loach family, clown loaches are active and colorful fish, but they can grow to be quite large over time. They are best suited for larger tanks of 55 gallons or more because they thrive in schools. (A single specimen can be kept in a smaller tank, but for the health of the fish, this is not recommended.)

Kuhli Loach

Scientific Name: Pangio kuhlii

Also Known As: Coolie Loach, Prickly Eye

Adult Size: 4 inches (12 cm)

Lifespan: 10 years

Minimum Tank Size: 15 gallon

pH: 6.0–6.5

Hardness: 1–10 dGH (5 dGH is preferred)

Tankmates: Keep in schools with small peaceful fish.

Kuhlis are more active at night. During the day it’s quite common for them to find a cozy spot and remain hidden until dark. Like all other loaches, they are happiest when in the company of a school of their own kind. Cover all filter intakes well, as this species has been known to find its way into impellers.

Horsehead Loach

Scientific Name: Acantopsis dialuzona

Also Known As: Banana Fish, Horseface Loach, Long-Faced Loach, Long-Nosed Loach

Temperature: 40–77 Fahrenheit (4–25 Celsius)

Tankmates: Peaceful with any fish

This loach truly does have a head that is distinctly horse-shaped. It is also a shy loach; aquarists often don’t see them for days at a time. They love to burrow below the substrate with just their eyes protruding to keep an eye out for food or predators. One way to be sure to see them is to turn off the lights in the evening and drop a few sinking food tablets in the tank. Fitting the tank with a moonlight will also make the horsehead loach easier to see.

Weather Loach

Scientific Name: Misgurnus angullicaudatus

Also Known As: Amur Mud loach, Dojo Loach, Japanese Loach, Japanese Weatherfish, Oriental Weatherfish, Pond Loach

Minimum Tank Size: 30 gallon

pH: 6.0–8.0

Hardness: 1–12 dGH (5 dGH is preferred)

Temperature: 64–75 Fahrenheit (18–24 Celcius)

Tankmates: Peaceful schooling fish

Weather loaches are known for their sensitivity to changes in barometric pressure. They are active fish, but when weather changes take place, they become even more active. This species is one of the few loaches that do not need to be kept in a school. They get along well with virtually all other fish and provide plenty of action for the tank.

Yoyo Loach

Scientific Name: Botia lohachata

Also Known As: Almorha Loach, Pakistani Loach, Reticulated Loach, Y-Loach

Adult Size: 3–5 inches (7–13 cm)

pH: 6.5–7.5

Temperature: 75–86 Fahrenheit (24–30 Celsius)

Yoyo loaches proudly sport their name on their sides. They are active, personable fish that often learns to recognize their owner. Like other loaches, they prefer to be kept in schools and can be shy until they become comfortable with their habitat.

Zebra Loach

Scientific Name: Botia striata

Also Known As: Candystripe Loach, Crossbanded Loach, Lined Loach, Striped Loach, Tiger Loach, Zebra Botia

Adult Size: 4 inches (10 cm)

Lifespan: 10+ years

Temperature: 73–79 Fahrenheit (23–26 Celsius)

Tankmates: Peaceful schooling fish, comfortable with all species

Zebra loaches are easily recognized by their many vertical bands that even cross over onto their fins. They are one of the smallest members of the loach family, and their smaller size and peaceful nature make them a good candidate for many community aquariums.