What size tank does a Rosy Loach need?

Rosy Loach needs a minimum of 5 gallons, with 8 gallons recommended. They are bottom swimmers. Keep in groups of 6+.

Is Rosy Loach good for beginners?

Rosy Loach is rated "intermediate" difficulty (2/5). Great for beginners.

What fish are compatible with Rosy Loach?

Rosy Loach is peaceful. Compatible tank mates include other peaceful fish with similar water parameters (pH 6.5-7.5, temp 72-79°F).

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Rosy Loach

Petruichthys sp.

Family: Cobitidae • Origin: Various

Rosy Loach (Petruichthys sp.) is a peaceful loach reaching 1 inches. Keep in groups of 6+. Minimum tank size: 5 gallons.

Min Tank

5 gal

Max Size

Temperature

72-79°F

6.5-7.5

Lifespan

2 years

School Size

Swim Level

bottom

Hardness

5-15 dGH

peacefulintermediateomnivoreschooling

Is Rosy Loach Right for Your Tank?

Rosy Loach is an excellent choice for beginners — rated "intermediate" difficulty (2/5). They're hardy, forgiving of minor water parameter fluctuations, and generally easy to feed. At just 5 gallons minimum, they work well in nano tanks and smaller setups.

With a peaceful temperament, Rosy Loach makes a great community fish. They coexist well with other non-aggressive species of similar size. This is a schooling species — keep at least 6 together, or they may become stressed and display abnormal behavior. Expected lifespan: 2 years with proper care.

Common Mistakes with Rosy Loach

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Keeping fewer than 6 together

Rosy Loach is a schooling species — they need a group of at least 6 to feel secure. Lone or paired individuals become stressed, hide constantly, and may develop health issues or aggression.

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Putting them in a tank under 5 gallons

While 5 gallons is the minimum, nano tanks require more frequent water changes and leave less room for error. A slightly larger tank (8 gal) is much more forgiving.