A fascinating bottom-dweller adapted to fast-flowing mountain streams in Asia. It features a unique, flattened body allowing it to cling to smooth rocks in heavy currents. It requires highly oxygenated, cooler water (18-24°C) with strong flow. Often confused or mislabeled in the trade with its smaller, more common cousin, Beaufortia kweichowensis. They are specialized grazers that feed heavily on biofilm and algae.
Hillstream Loach At a Glance
Hillstream Loach Tank Requirements
Will Hillstream Loach fit in your tank?
Care guides tell you what Hillstream Loach needs, the next question is whether your tank can safely provide it. Test Hillstream Loach against your tank size, maintenance needs, and the fish you already keep before you buy.
Hillstream Loach Water Parameters
Hillstream Loach Temperament & Compatibility
Hillstream Loach Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard
The standard form. Best kept in groups of 3 or more in a specialized 'hillstream' setup. While generally peaceful with other species, conspecifics will engage in harmless, visual 'tussling' over dominant feeding rocks.
Differs in 1 trait from base species
Also known as: Wild Type
Hillstream Loach Care Guide Summary
The Hillstream Loach, scientifically known as Beaufortia leveretti, belongs to the Loaches family group. Adults reach a maximum size of approximately 12 cm and have a depressed body shape with a slow growth rate. Classified as peaceful, this species primarily occupies the bottom zone of the aquarium and produces a low level of biological waste.
To thrive, the Hillstream Loach requires a freshwater only aquarium with a minimum volume of 75 litres and a tank length of at least 60 cm. Water temperature should be maintained between 18°C and 24°C, with a pH range of 6.5–8 and a general hardness of 4–15 dGH. A high water flow is preferred.
The Hillstream Loach is a rewarding species to keep, provided its core environmental needs are met. The Hillstream Loach is typically available in one standard form.
Hillstream Loach Habitat Setup
When setting up an aquarium for the Hillstream Loach, a high water flow best suits their natural preferences. Because this species occupies the bottom zone, the aquarium layout should prioritise sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include smooth gravel or rounded substrate to protect their sensitive barbels and an established tank with natural algae growth, as they depend on it as a primary food source.
Hillstream Loach Compatibility Notes
Classified as peaceful, the Hillstream Loach is a social species that requires the company of its own kind to thrive. When choosing tankmates, territorial behaviour may cause issues if hiding spots or floor space are limited and their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the bottom zone can help reduce competition and territorial overlap.
Who Hillstream Loach Is Actually For
Hillstream Loach is best for a fishkeeper who wants a species that can settle into a calmer community setup and can provide a keeper who can commit to a proper group of at least 3. It makes the most sense for a hobbyist who will actually build around its needs, especially smooth gravel.
The most common mistake is buying Hillstream Loach for looks first and only later discovering how its adult size, behavior, or bioload changes the whole tank plan. Another frequent problem is underestimating its social needs. A token pair or trio often behaves very differently from a real group.
Hillstream Loach Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Hillstream Loach.
20 Gallon High
20 Gallon Long
29 Gallon Standard
30 Gallon Breeder
36 Gallon Bowfront
40 Gallon Breeder
Show 17 more tank sizes
Frequently Asked Questions About Hillstream Loach
How big does Hillstream Loach get?
Hillstream Loach (Beaufortia leveretti) typically reaches a maximum adult size of approximately 12 cm. They have a depressed body shape and a slow growth rate.
What tank size does Hillstream Loach need?
A minimum aquarium volume of 75 litres and a tank length of at least 60 cm are recommended for Hillstream Loach. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Hillstream Loach need?
Hillstream Loach thrives in freshwater only conditions with a temperature range of 18–24°C, a pH between 6.5 and 8, and a general hardness of 4–15 dGH. A high water flow is preferred.
Is Hillstream Loach peaceful or aggressive?
Hillstream Loach is classified as peaceful with an aggression score of 2 out of 10. They are generally well-suited to peaceful community tanks.
Can Hillstream Loach live alone?
No, Hillstream Loach should be kept in groups of at least 3 to reduce stress and encourage natural behaviour.
Does Hillstream Loach have any special tank requirements?
Yes. Hillstream Loach benefits from smooth gravel (sensitive barbels) and established algae (otocinclus) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Useful setup supplies
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Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- May 6, 2026
- Last updated
- May 6, 2026
- Issues or corrections?
- Contact the editorial team
Top Tank Mates for Hillstream Loach
These fish are strong compatibility matches for Hillstream Loach based on water preferences, temperament, adult size, and tank behavior.
Scissortail Rasbora
Rasbora trilineata
Ideal Tank MatesRummynose Rasbora
Sawbwa resplendens
Ideal Tank MatesRosy Red Minnow / Fathead Minnow
Pimephales promelas
Ideal Tank MatesRose Danio
Danio roseus
Ideal Tank MatesSunset Platy (Variatus Platy)
Xiphophorus variatus
Ideal Tank MatesTiger Danio
Devario maetaengensis
Ideal Tank MatesPlants That Suit Hillstream Loach
These plants pair well with Hillstream Loach based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
African Water Fern
Bolbitis heudelotii
Boivin's Aponogeton
Aponogeton boivinianus
Capuron's Aponogeton
Aponogeton capuronii
Madagascar Lace Plant
Aponogeton madagascariensis
African Onion Plant
Crinum calamistratum
Afzel's Anubias
Anubias afzelii
Fish Similar to Hillstream Loach
Spotted Hillstream Loach
Gastromyzon punctulatus
A highly specialized, rheophilic (flow-loving) fish adapted to cling to rocks in fast-moving streams. Their modified fins act like suction cups. They graze constantly on biofilm and algae. To thrive, they require cooler, highly oxygenated water with strong currents (like a river manifold or powerhead setup) and plenty of smooth river stones.
Reticulated Hillstream Loach
Sewellia lineolata
A fascinating, highly specialized loach adapted to fast-flowing, oxygen-rich rapids. They have a flattened, ray-like body allowing them to cling to smooth rocks where they graze on algae and biofilm (aufwuchs). They strictly require strong water flow, high dissolved oxygen, and cooler temperatures. Males frequently engage in visually striking but harmless territorial 'battles' over prime feeding rocks.
Sumo Loach
Schistura balteata
The Sumo Loach is a fascinating, highly active bottom dweller native to fast-flowing hillstreams in Myanmar. Named for their aggressive, 'wrestling' matches over territory, they require highly oxygenated water, strong flow, and plenty of visual barriers like smooth river stones. They are highly intolerant of conspecifics and other bottom dwellers in small tanks.
Kuhli Loach
Pangio kuhlii
A remarkably peaceful, eel-like bottom dweller native to the slow-moving forest streams of Southeast Asia. Famous for its orange and dark brown banding, the Kuhli Loach is an excellent scavenger. They are notoriously shy and nocturnal, requiring dense planting, leaf litter, and most importantly, a soft sand substrate to burrow in without damaging their delicate barbels. They must be kept in groups to feel secure and prevent severe stress.
Phuket Loach
Schistura robertsi
The Phuket Loach is a small, active stone loach native to fast-flowing, clear streams in the Malay Peninsula and southern Thailand. Like most Schistura species, they are highly territorial bottom-dwellers that require highly oxygenated water with moderate to high flow. They should be kept in setups with smooth river stones to break lines of sight and minimize aggression.
Yoyo Loach
Botia almorhae
A popular, energetic, and boisterous bottom dweller native to the slow-moving and still waters of the Ganges basin (India/Pakistan). Named 'Yoyo' because the dark reticulated patterns on juveniles often resemble the letters Y-O-Y-O. As they mature, the pattern becomes a complex mosaic. They are excellent snail eaters but can be semi-aggressive/boisterous, making them unsuitable for shy or long-finned tank mates.