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Chinese Algae Eater

Gyrinocheilus aymonieri

Freshwater South-east Asia Usually captive bred

Sold as an algae eater, but adults grow past 20 cm, turn aggressive and sometimes rasp slime from other fish. Not an algae cure for most tanks. Needs space to avoid conflict.

Also called: Siamese algae-eater, Algae eater, Biforated carp, Chinese algae-eater.

20 cm adult length, drawn to scale. torpedo body.

Try it in the planner Opens a tank sized to its minimum with 1 fish added.

What it needs

ItemValueBecause
Adult length 20 cm Used for the Space check: the tank must be long enough for the fish to turn round.
Smallest tank 200 L, at least 120 cm long estimated The least water and floor length this species is kept in for good, as a single fish or smallest group.
Extra water per added fish 50 L estimated What each further fish adds once the minimum is met.
Waste load Class 3 of 5 estimated How much waste an adult makes against its size. Feeds the Load check.
Temperature 22 to 26 C Stock sharing a tank need overlapping ranges.
pH 6.5 to 7.5 Compared with tankmates in the Water check.
Hardness GH 5 to 18, KH 3 to 10 Degrees of general and carbonate hardness.
Flow Medium Low-flow fish are stressed in a strong current.
Light Moderate Matched to the lighting class on the needs sheet.
Group size Single fish is fine Not a schooling species.
Temperament Aggressive Territorial: strong.
Swims in Near the bottom Fish that use different levels share a tank more easily.
Lifespan About 10 years A fish is a long commitment.
Experience Some experience helps A guide to how forgiving the species is of mistakes.
Jumps Yes Keep the tank covered.

Tags marked estimated are judged from the size and habits of the species rather than measured, so treat them as a sensible default.

Diet and tank layout

Chinese Algae Eater is an herbivore that swims in the lowest part of the tank. It is safe with plants. Give it plenty of cover.

Tankmates

Works with

No close matches in the data. Check the pair tool.

Depends

Nothing flagged.

Avoid

Compare any two fish on the compatibility page, or print the equipment for a stock on the needs sheet. How this is worked out: the method.