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.
Phuket Loach At a Glance
Phuket Loach Tank Requirements
Will Phuket Loach fit in your tank?
Care guides tell you what Phuket Loach needs, the next question is whether your tank can safely provide it. Test Phuket Loach against your tank size, maintenance needs, and the fish you already keep before you buy.
Useful setup supplies
We may earn from qualifying purchases
Phuket Loach Water Parameters
Water care products
We may earn from qualifying purchases
Phuket Loach Temperament & Compatibility
Phuket Loach Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard
The standard wild form. Best kept in a river-manifold or high-flow hillstream setup. They aggressively defend their chosen caves and crevices, so providing multiple hiding spots per loach is essential if keeping a group.
Same care requirements as the base species
Also known as: Wild Type
Phuket Loach Care Guide Summary
The Phuket Loach, scientifically known as Schistura robertsi, belongs to the Loaches family group. Adults reach a maximum size of approximately 6 cm and have a fusiform body shape with a moderate growth rate. Classified as semi-aggressive, this species primarily occupies the bottom zone of the aquarium and produces a low level of biological waste.
To thrive, the Phuket 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 28°C, with a pH range of 6–7.5 and a general hardness of 2–12 dGH. A high water flow is preferred.
The Phuket Loach is a rewarding species to keep, provided its core environmental needs are met. The Phuket Loach is typically available in one standard form.
Phuket Loach Habitat Setup
When setting up an aquarium for the Phuket 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 a sand substrate to accommodate their sifting behaviour and smooth gravel or rounded substrate to protect their sensitive barbels.
Phuket Loach Compatibility Notes
Classified as semi-aggressive, the Phuket Loach is adaptable and can be kept singly or in a small group, offering flexibility when planning a community tank. When choosing tankmates, conspecific aggression can be intense, especially in smaller tanks, 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.
Phuket Loach Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Phuket Loach.
20 Gallon High
20 Gallon Long
29 Gallon Standard
30 Gallon Breeder
36 Gallon Bowfront
40 Gallon Breeder
Show 17 more tank sizes
Feeding products
We may earn from qualifying purchases
.webp?2026-04-25T14%3A35%3A38.022Z)
Frequently Asked Questions About Phuket Loach
How big does Phuket Loach get?
Phuket Loach (Schistura robertsi) typically reaches a maximum adult size of approximately 6 cm. They have a fusiform body shape and a moderate growth rate.
What tank size does Phuket Loach need?
A minimum aquarium volume of 75 litres and a tank length of at least 60 cm are recommended for Phuket Loach. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Phuket Loach need?
Phuket Loach thrives in freshwater only conditions with a temperature range of 18–28°C, a pH between 6 and 7.5, and a general hardness of 2–12 dGH. A high water flow is preferred.
Is Phuket Loach peaceful or aggressive?
Phuket Loach is classified as semi-aggressive with an aggression score of 5 out of 10. They can work in community setups but may clash with certain tankmates.
Can Phuket Loach live alone?
Yes, Phuket Loach can be kept singly or in a group. They are flexible and adapt well to both setups.
Does Phuket Loach have any special tank requirements?
Yes. Phuket Loach benefits from smooth gravel (sensitive barbels) and sand (sifters) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Plants That Suit Phuket Loach
These plants pair well with Phuket 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 Phuket Loach
Mottled Loach
Paracanthocobitis botia
A highly active, rheophilic (current-loving) loach native to fast-flowing streams in South Asia. Known for their intricate mottled patterns and 'zipper-like' lateral line, they are boisterous and establish clear social hierarchies. They must be kept in groups to prevent bullying and require well-oxygenated water with a smooth substrate to protect their delicate barbels.
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.
Bengal Loach
Botia dario
A strikingly patterned, highly active loach native to the Brahmaputra and Ganges basins. Like most Botiid loaches, they establish complex social hierarchies and must be kept in groups to prevent stress and aggression. They are excellent snail hunters but require a soft, sandy substrate to protect their delicate sensory barbels from abrasion.
Hillstream Loach
Beaufortia leveretti
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.
Angelicus Botia
Botia kubotai
A strikingly patterned and highly active river loach native to Myanmar. As they mature, their distinct stripes break into intricate golden 'polka dots' over a dark body. Highly social, they must be kept in groups to establish complex pecking orders; keeping them in too small numbers leads to hiding or aggressive lashing out. They are excellent at controlling snail populations but require well-oxygenated water and a spacious footprint.
Thai Micro Crab
Limnopilos naiyanetri
The Thai Micro Crab is a fully aquatic, extremely small freshwater crab native to a single river system (the Tha Chin river) in Thailand. They are exceptionally peaceful and lack standard defensive capabilities. Instead of hunting, they use tiny hairs on their claws to catch detritus and filter-feed biofilm. Due to their miniature size and incredibly shy nature, they must be kept with peaceful nano tank mates (like Neocaridina shrimp) or in a species-only setup to prevent predation.