Kuhli Loach Tank Mates

Kuhli loaches are peaceful, eel-like bottom-dwellers — quirky, social, and compatible with almost any calm fish.

They spend their time sifting the substrate and hiding, never bothering tankmates, which makes them an exceptionally safe community addition (even with a betta). Keep them in a group of five or more on soft sand with plenty of cover, or you will rarely see them.

Kuhli Loach key facts

The sourced figures the engine uses to judge Kuhli Loach pairings.

Top Kuhli Loach tank mates

A ranked shortlist: the species the engine clears with Kuhli Loach and that suit its size and temperament best — tap a name for its care guide, or use + Add to test the pairing in the planner.

No tank mates match these filters — try removing one. Reset filters

Other engine-cleared options (not necessarily ideal)

These clear TankStocking's hard welfare checks with Kuhli Loach, but are larger, bolder, or otherwise less ideal than the shortlist above — read up before committing.

Possible with care

These can work, but the engine flags something to watch — read the reason before you commit.

• Betta (Siamese Fighting Fish) — Territorial
• Paradise Fish — Aggression
• Cockatoo Dwarf Cichlid (Apisto Cacatuoides) — Territorial
• Convict Cichlid — Aggression
• Firemouth Cichlid — Territorial
• Jewel Cichlid — Aggression
• Kribensis (Rainbow Krib) — Territorial
• Golden Wonder Killifish (Striped Panchax) — Aggression
• Rainbow Shark — Aggression
• Redtail Black Shark — Aggression
• Pictus Catfish — Aggression

Best avoided

A hard welfare check fires for each of these — don't mix them with Kuhli Loach.

• Chocolate Gourami — Species-only fish
• Licorice Gourami — Species-only fish
• Snakeskin Gourami — Predation risk
• Bala Shark — Predation risk
• Rosy Barb — Temperature clash
• Tinfoil Barb — Predation risk
• Green Severum — Predation risk
• Multifasciatus Shell-Dweller — Territorial, Species-only fish
• Oscar — Predation risk, Aggression
• Common Goldfish — Temperature clash, Coldwater + tropical
• Fancy Goldfish — Temperature clash, Coldwater + tropical
• Gold White Cloud Mountain Minnow — Temperature clash, Coldwater + tropical
• Rosy Red Minnow (Fathead Minnow) — Temperature clash, Coldwater + tropical
• White Cloud Mountain Minnow — Temperature clash, Coldwater + tropical

Keeping Kuhli Loach well: the detail

Beyond the table — the behaviour, the parameters that actually move the needle, and the mistakes that cost fish. Hobbyist context, not a verdict; the planner above is what judges your plan.

Water parameters in practice

Kuhli loaches want soft, slightly acidic to neutral water (pH 5.5–7), 24–30 °C, and — above all — fine sand they can burrow into. Sharp substrate damages these scaleless, eel-like fish, and a bare or coarse bottom leaves them stressed and hidden. Secure the lid and the filter intake: they are escape artists and will find any gap.

Why Kuhli Loach behaves the way it does

Kuhlis are nocturnal, eel-bodied loaches from the soft, leaf-littered forest streams of South-East Asia, where they thread through the substrate and detritus in groups. The burrowing, the hiding, and the night activity are all natural — a kuhli out in bright open water would be the unusual sight. Being scaleless makes them sensitive to medications and to rough surfaces.

Common Kuhli Loach stocking mistakes

The first mistake is keeping one or two: kuhlis are social and a small group hides permanently, so five or more is the minimum. The second is coarse gravel, which abrades them and gives them nowhere to burrow. The third is dosing the tank with scaleless-unsafe medication, which can kill them.

Early signs something is wrong

A kuhli that lies out listless in daylight, looks pale or has reddened skin, or stops foraging at night is showing stress — often water quality or rough substrate. Because they are scaleless, ich and skin issues show readily, so watch new arrivals closely. A settled group burrows by day and forages busily after dark.

How tank size changes the answer

Five-plus in a 20-gallon with sand and dense cover is the baseline. They use the bottom, so footprint and hiding spots matter more than volume — a long, well-planted tank with caves coaxes them out far more than a tall, sparse one. Larger groups are bolder and more often seen.

Kuhli Loach community ideas

Each build is scored by the same engine as the planner — tap one to load it.

Common questions

More on Kuhli Loach

Related guides on TankStocking — each scored by the same welfare engine as the planner.

Compatibility is a planning estimate: individual temperament, tank layout, and group sizes all matter. Cycle the tank, add fish gradually, and watch how they behave. See the methodology or browse the full freshwater fish list.