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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
1"
Temperature
72-79°F
pH
6.5-7.5
Lifespan
2 years
School Size
6+
Swim Level
bottom
Hardness
5-15 dGH
peacefulintermediateomnivoreschooling
Care Tips
- • Max size: 1 inches
- • Temperature: 72-79°F
- • pH: 6.5-7.5
- • Schooling — keep 6+ together
- • peaceful temperament — safe with community fish
Feeding: Standard omnivore diet. Accepts foods appropriate for Cobitidae species.
Compatibility Notes: Typical peaceful Cobitidae species.
Tank Setup & Water Parameters
Tank Requirements
- Minimum Tank Size
- 5 gallons
- Recommended Tank Size
- 8 gallons
- Swimming Level
- bottom
- Minimum School Size
- 6+ fish
Water Parameters
- Temperature
- 72–79°F
- pH Range
- 6.5–7.5
- Hardness (dGH)
- 5–15
- Water Type
- freshwater
Behavior & Temperament
- Temperament
- peaceful
- Aggression Level
- 1/5
- Schooling
- Yes
- Territorial
- No
- Fin Nipper
- No
- Predatory
- No
- Diet Type
- omnivore
- Growth Rate
- moderate
Typical peaceful Cobitidae species.
Breeding
- Breeding Type
- egg layer
- Breeding Difficulty
- moderate
- Lifespan
- 2 years
Ideal For
5 gallon
Compatible Tank Mates
View all →
Neon Tetra
Paracheirodon innesi
70-81°FpH 6-710+ gal
peacefulschooling 6+1.5"
Ember Tetra
Hyphessobrycon amandae
73-84°FpH 5.5-75+ gal
peacefulschooling 8+0.8"
Rummy Nose Tetra
Hemigrammus rhodostomus
75-84°FpH 5.5-720+ gal
peacefulschooling 6+2.5"
Black Neon Tetra
Hyphessobrycon herbertaxelrodi
73-81°FpH 5.5-7.510+ gal
peacefulschooling 6+1.6"
Serpae Tetra
Hyphessobrycon eques
72-82°FpH 6-7.520+ gal
semi-aggressiveschooling 6+1.75"
Black Skirt Tetra
Gymnocorymbus ternetzi
70-82°FpH 6-7.515+ gal
peacefulschooling 5+3"
Similar Species
Kuhli Loach
Pangio kuhlii
75-86°FpH 5.5-715+ gal
peacefulschooling 5+4"
Hillstream Butterfly Loach
Beaufortia kweichowensis
65-75°FpH 6.5-7.510+ gal
peacefulschooling 3+3"
Otocinclus Catfish
Otocinclus vittatus
72-79°FpH 6-7.510+ gal
peacefulschooling 4+2"
Dwarf Chain Loach
Ambastaia sidthimunki
75-82°FpH 6-7.520+ gal
peacefulschooling 5+2.5"