Panda loach
Yaoshania pachychilus
advanced careOverview
The panda loach (Yaoshania pachychilus) is a strikingly marked hillstream loach from the cool mountain streams of Guangxi, China. Juveniles wear bold black-and-white panda bands that break into a fine speckled pattern with age. Flattened and suckered to cling to rocks in fast water, it is an active, sociable grazer — but a specialist that needs a cool, high-flow, biofilm-rich tank rather than a standard warm community.
Tank & water
A group needs a mature, high-flow 75-litre (20-gallon) tank or larger with smooth rocks and strong current.
- Temperature: 18–23 °C — cool and often unheated; avoid warm tropical temperatures.
- Oxygen and flow: high oxygen and strong current are essential; use a powerful filter or an added powerhead to mimic a stream.
- Water: neutral, pH 6.8–7.6, clean and stable. Test with a kit.
- Mature, well-lit rockscape: smooth stones and good lighting grow the algae and biofilm they graze.
Feeding
Panda loaches are grazers that spend the day rasping biofilm and algae from rocks. In a mature tank much of their diet grows in place; supplement with algae wafers, blanched courgette and spinach, and small frozen foods such as daphnia and cyclops. A varied menu keeps them healthy, but grazing surface is the foundation of their diet.
Behaviour & tankmates
They are peaceful and social — keep five or six so they interact naturally. Ideal companions are other cool-water, high-flow fish such as white cloud mountain minnows and hillstream loaches. Avoid warm-water tropicals, slow still-water fish and anything that competes hard for algae. Provide open rock surfaces and plenty of current.
Because they cannot tolerate the low oxygen and high temperatures of a typical warm community, plan the tank around their stream needs from the start rather than trying to adapt an existing setup. A tight lid is wise too, as strong flow and their climbing habit can tempt them out of the water.
Give the panda loach a cool, oxygen-rich, mature stream tank and it becomes a fascinating, long-lived grazer — but commit to those conditions before you buy, as it is a true specialist. See our best nano aquarium picks for compact tanks that can be run cool and high-flow.
Panda loach — frequently asked questions
Why is the panda loach an advanced fish?
It needs cool, fast-flowing, highly oxygenated water and a mature tank coated in the biofilm and algae it grazes — conditions most warm, gently filtered community tanks cannot provide. It is not delicate once those needs are met, but recreating a temperate hillstream is beyond a typical beginner setup.
Does the panda loach need cool water and lots of flow?
Yes. It comes from cool, oxygen-rich mountain streams in China, so it wants temperatures around 18–23 °C, strong current and high oxygen. Warm, still tropical water is a poor and stressful match, so plan for a powerhead or high-flow filter and no heating in most rooms.
What do panda loaches eat?
Mostly aufwuchs — the film of algae, biofilm and micro-organisms that grows on rocks in a mature, well-lit tank. Supplement with algae wafers, blanched vegetables and small frozen foods, but a mature tank with plenty of grazing surface is essential to keep them fed.
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