Species · Crossocheilus oblongus / C. langei (trade)

Siamese algae eater: tank size, water and tank mates

Active algae grazer that grows to 15 cm; will eat dwarf shrimp but usually ignores snails and larger shrimp.

Adult size15 cm (5.9 in)
Minimum tank80 US gal
Temperature24–26 °C (75–79 °F)
pH6.5–7.5
Temperamentpeaceful
Keep in groups of3+
Swimsall
Shrimp & snailsCaution

Check a tank with Siamese algae eater

Good tank mates for Siamese algae eater

These species share its temperature range and temperament, with no fin-nipping or predation risk under our rules. Still check your tank size and bioload in the checker.

African butterflyfish · African dwarf frog · Angelfish · Banjo catfish · Betta (male) · Black neon tetra · Black phantom tetra · Black ruby barb · Black skirt tetra · Bleeding heart tetra · Bloodfin tetra · Blue acara · Bolivian ram · Bristlenose pleco · Bronze corydoras · Buenos Aires tetra · Bumblebee goby · Celestial pearl danio · Cherry barb · Chili rasbora · Chinese algae eater · Clown killifish · Clown pleco · Colombian tetra

Avoid with Siamese algae eater

Boeseman's rainbowfish (temperature) · Common / comet goldfish (temperature) · Convict cichlid (aggression) · Demasoni cichlid (aggression) · Discus (temperature) · Dojo loach (temperature) · Fancy goldfish (temperature) · German blue ram (temperature) · Gold barb (temperature) · Jack Dempsey (aggression) · Jewel cichlid (aggression) · Medaka (temperature) · Paradise fish (temperature) · Pea puffer (aggression) · Rosy barb (temperature) · White cloud mountain minnow (temperature)

Sources

Checked 2026-11-09 · confidence: medium. These are cautious community guidelines, not guarantees. Not veterinary advice. Report an error.