Identity and search names

Common name
Kuhli loach
Scientific name
Pangio semicincta
Other names
Half-banded kuhli loach, Coolie loach, Acanthophthalmus semicinctus, Pangio kuhlii trade label
Category
Freshwater fish
Group
Loaches
Origin
Malay Peninsula, Sumatra and Borneo; aquarium shipments may contain several Southeast Asian Pangio species
Review outcome
PASSED

Environment and housing

Environment
Freshwater
Care level
Beginner to intermediate
Adult size
Usually about 8–10 cm total length
Expected lifespan
About 8–12 years
Minimum housing
At least 90 L with a broad sandy floor for a group of 8–12 or more
Temperature
23–28 °C
pH
5.0–7.5
Hardness or minerals
Very soft to moderately hard
Salinity
Freshwater
Lighting
Subdued with extensive shaded refuge
Social structure
Keep at least 8–12; single fish remain hidden and cannot express normal group behaviour
Placement or swimming zone
Bottom and within soft substrate or cover
Temperament
Peaceful, shy and mainly crepuscular; not boisterous
Compatibility
Use small peaceful fish that leave food for bottom feeders; avoid aggressive cichlids, sharp substrate and large predators
Habitat structure
Fine smooth sand, leaf litter, wood, rounded caves, dense cover, a tight lid and sponge-guarded filter intakes

Feeding and nutrition

Diet
Small worms, crustaceans, insect larvae, detrital foods and fine sinking prepared foods
Feeding frequency
Feed sinking foods after lights dim and verify every loach receives food

Breeding and reproduction

Breeding or reproduction
Captive spawning is rare and species-specific methods are poorly standardised. Do not present routine egg-scattering instructions as reliable for ordinary home aquaria
Parental care
No documented parental care after spawning

System demands

Filtration
Use mature biological filtration sized for the full adult group and feeding load, with intake protection where juveniles, long fins or small fish are present. Provide steady turnover without preventing normal swimming or resting.
Aeration
Maintain strong surface gas exchange and stable dissolved oxygen. Increase aeration during warm weather, medication, transport recovery, breeding crowding or any ammonia or nitrite event.
Maintenance
Test ammonia, nitrite and nitrate, remove waste from feeding and shelter zones, and perform regular temperature- and chemistry-matched water changes before nitrate or dissolved organics accumulate.

Detailed husbandry

Identity scope
This profile is scoped to Pangio semicincta, the half-banded kuhli commonly found in trade. True P. kuhlii and several other Pangio are frequently mixed or mislabelled, so pattern alone should not be treated as a confirmed species diagnosis.
Adult size and space
Usually about 8–10 cm total length. At least 90 L with a broad sandy floor for a group of 8–12 or more. Plan around adult dimensions, activity, social structure, aggression and waste production rather than sale size.
Social structure
Keep at least 8–12; single fish remain hidden and cannot express normal group behaviour
Placement or swimming zone
Primary zone: Bottom and within soft substrate or cover. Keep that zone usable for movement, feeding and refuge.
Feeding ecology
Small worms, crustaceans, insect larvae, detrital foods and fine sinking prepared foods
Feeding plan
Feed sinking foods after lights dim and verify every loach receives food
Water stability
Maintain 23–28 °C; pH 5.0–7.5; hardness/minerals: Very soft to moderately hard. Stable oxygenation and nitrogen-cycle control matter more than chasing one exact number.
Adult projected load
Plan capacity for Keep at least 8–12; single fish remain hidden and cannot express normal group behaviour at the documented adult size (Usually about 8–10 cm total length) in At least 90 L with a broad sandy floor for a group of 8–12 or more. Include feeding intensity, territorial behaviour and breeding growth rather than counting sale-size juveniles.
Filtration
Use mature biological filtration sized for the full adult group and feeding load, with intake protection where juveniles, long fins or small fish are present. Provide steady turnover without preventing normal swimming or resting.
Aeration
Maintain strong surface gas exchange and stable dissolved oxygen. Increase aeration during warm weather, medication, transport recovery, breeding crowding or any ammonia or nitrite event.
Maintenance
Test ammonia, nitrite and nitrate, remove waste from feeding and shelter zones, and perform regular temperature- and chemistry-matched water changes before nitrate or dissolved organics accumulate.
Habitat structure
Fine smooth sand, leaf litter, wood, rounded caves, dense cover, a tight lid and sponge-guarded filter intakes
Compatibility plan
Use small peaceful fish that leave food for bottom feeders; avoid aggressive cichlids, sharp substrate and large predators
Breeding plan
Captive spawning is rare and species-specific methods are poorly standardised. Do not present routine egg-scattering instructions as reliable for ordinary home aquaria Parental care: No documented parental care after spawning.
Quarantine
Quarantine new fish in a separate cycled aquarium with dedicated equipment. Match temperature and mineral chemistry gradually, confirm feeding and normal respiration, and never add transport water to the established aquarium.
Welfare checks
Maintain the stated adult space and social structure, verify feeding and intervene early when injury, exclusion, weight loss, abnormal respiration or altered behaviour appears. These loaches enter filter intakes, squeeze through lid gaps and can be injured by coarse substrate or careless netting around the suborbital spines.
Biosecurity and release
Never release fish, fry, eggs, aquarium water, sediment, plants or live foods into drains, dams or natural waterways. Confirm current Australian import conditions and South Australian possession, trade and movement rules before acquisition or transfer.
Main risk
These loaches enter filter intakes, squeeze through lid gaps and can be injured by coarse substrate or careless netting around the suborbital spines.
Overridable warnings
These loaches enter filter intakes, squeeze through lid gaps and can be injured by coarse substrate or careless netting around the suborbital spines. Any override must still preserve adult space, social welfare, stable chemistry, oxygen and filter capacity.

Welfare and risk

Welfare checks
Maintain the stated adult space and social structure, verify feeding and intervene early when injury, exclusion, weight loss, abnormal respiration or altered behaviour appears. These loaches enter filter intakes, squeeze through lid gaps and can be injured by coarse substrate or careless netting around the suborbital spines.
Main warning
These loaches enter filter intakes, squeeze through lid gaps and can be injured by coarse substrate or careless netting around the suborbital spines.
Biosecurity
Never release fish, fry, eggs, aquarium water, sediment, plants or live foods into drains, dams or natural waterways. Confirm current Australian import conditions and South Australian possession, trade and movement rules before acquisition or transfer.

Sources

Source note

Current identity or scope, husbandry, system-demand, welfare and Australian biosecurity evidence checked; active retired-source links removed; all AquaNexus wording is original.

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