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Fish Freshwater Care: hard Peaceful

Vaillant's Chocolate Gourami

Sphaerichthys vaillanti
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Other names: Sphaerichthys vaillanti, Vaillanti
Group: Labyrinth fish · Family: Osphronemidae · Origin: Southeast Asia — Borneo, the West Kalimantan region of Indonesia

The Bornean relative of the chocolate gourami; unlike most fish, the female is the more colorful one and glows with dark bands on a red background during courtship. A sensitive species that needs very soft, acidic peat water.

Will it suit my tank?

Last updated October 16, 2026

Temperature
25–29°C
pH
4.5–6.5
Hardness
0–5 dGH
Adult size
5.5 cm
Minimum tank size
60 liters
Social structure
Colony
Group
at least 2, ideally 6+
Swimming zone
Middle
Diet
Carnivore
Breeding
Mouthbrooder

Water parameters

Temperature25–29°C
pH4.5–6.5
General hardness (GH)0–5 dGH
Recommended range
Considered shrimp safe Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

Vaillant's chocolate gourami is the relative of the chocolate gourami native to West Kalimantan and grows to about 5–6 cm. Contrary to the usual pattern, in this species the female is more colorful: in the courtship period she takes on a brick-red body crossed by dark greenish-black vertical bands. It is a mouthbrooder; in this species the male is reported to take on the brooding. It depends on the very soft, acidic water of peat swamps, and its care requires expertise.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 60 liters for a small group, with a large footprint.
  • 25–28°C, pH 4.5–6.5, GH 0–5; reverse osmosis water or rainwater.
  • A thick layer of dried leaves, roots, floating plants and dim light.
  • Almost still water; small water changes with matching values.

Diet

October 16, 2026 · Suggest an edit

A carnivore that feeds on tiny organisms. Live and frozen brine shrimp, cyclops, daphnia, microworms and chopped bloodworms should be the staple; dry food alone is not enough. Feed small amounts twice a day.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Peaceful and timid; it forms a loose group with its own species. Next to fast, greedy tankmates it goes hungry, becomes stressed and falls ill. It is best kept in a species tank.

Good companions: Boraras species, pencilfish, sparkling gourami, very small and calm species suited to peat water.

Avoid: fast schooling fish, large gouramis and bettas, cichlids, species that need hard water.

A short profile for this species

The Vaillant's Chocolate Gourami page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026