How to Breed Pearl Gouramis: Bubble Nests and Fry Raising
Pearl gouramis are among the most beautiful and approachable labyrinth fish to breed — calm enough for a community tank, yet responsive enough to spawn with minimal intervention once conditions are right. Successfully getting a pair to breed pearl gouramis comes down to reading the fish, preparing the environment, and knowing exactly when to act. This guide from Gensou Aquascaping at 5 Everton Park, Singapore walks you through the full process from conditioning to free-swimming fry.
Sexing Pearl Gouramis
Trichopodus leerii is straightforward to sex once fish are mature (around 6–8 months old at 7–9 cm). Males develop a vivid orange-red flush across the throat and chest, most intense during spawning condition. The dorsal fin of males is elongated and pointed; females have shorter, rounded dorsals. When a pair is ready to spawn, the male’s chest colour deepens dramatically — a reliable visual trigger that conditioning is working.
Conditioning for Spawning
Feed the breeding pair heavily for two to three weeks prior to spawning. Frozen or live food accelerates conditioning — mosquito larvae, daphnia, and bloodworm all work well. Supplement with high-protein flake or pellet. The female should become noticeably rounded with eggs. Feed twice daily, siphon uneaten food after 30 minutes to prevent water quality decline.
Slightly raising the temperature to 28–29°C (from a typical community range of 25–27°C) also signals spawning season. A partial water change with slightly cooler water — mimicking seasonal rain — can trigger nest building within 24–48 hours in a conditioned pair.
Spawning Tank Setup
A dedicated 40–60 litre spawning tank significantly improves fry survival. Set it up with a sponge filter on the lowest possible flow setting — strong current destroys bubble nests and scatters eggs. Keep water depth at 15–20 cm rather than a full fill; low water depth makes it easier for the male to reach the surface and for fry to breathe from the labyrinth organ once it develops. Water temperature 28°C, pH 6.5–7.0, very soft (GH 2–5).
Add floating plants — water lettuce, frogbit, or even handfuls of java moss pushed to the surface. The male will anchor his bubble nest under these. A few stems of Hygrophila or Vallisneria for the female to hide among completes the setup.
The Spawning Process
Once introduced to the spawning tank, the male immediately begins building a bubble nest if conditions are right. This can take anywhere from a few hours to two days. When the nest is established, he courts the female with flaring, circling, and display swims. The female initially flees — this is normal. Introduce the female only when the male has a substantial nest ready; otherwise he may become aggressively territorial.
Spawning occurs in a characteristic T-position embrace beneath the nest. The female releases eggs in batches of 50–150 per embrace, and the male fertilises and collects them with his mouth, placing them in the bubble nest. A full spawning session produces 200–800 eggs over one to three hours. Remove the female once spawning is complete — the male will guard the nest aggressively and may injure her.
Raising the Fry
Eggs hatch within 24–36 hours at 28°C. The male continues to retrieve any eggs or fry that fall from the nest. Once fry are free-swimming — typically 48–72 hours after hatching — remove the male as well. Fry are tiny (under 2 mm) and require infusoria or commercial fry food (Sera Micron, Hikari First Bites) for the first week. After five to seven days, they accept baby brine shrimp and micro worm.
Feeding frequency matters enormously: four to six small feeds per day produces far faster growth than two large feeds. Perform small water changes of 10–15% every two days using a sponge-covered siphon to avoid sucking up fry. At around eight weeks, juveniles are 1.5–2 cm and can be moved to a grow-out tank.
Common Problems and Solutions
Eggs turning white (fungused) in the nest usually indicates poor water quality or insufficient male care. Ensure zero ammonia and nitrite. If the male eats the eggs, the pair may not be ready — return both fish to the community tank for another two weeks of conditioning before trying again. Fry failing to survive past the first week almost always points to inadequate feeding rather than a disease issue. Pearl gourami fry are delicate but manageable with attentive care — raising your own is one of the most satisfying experiences the hobby offers.
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emilynakatani
Still Have Questions About Your Tank?
Drop by Gensou Aquascaping — most walk-in questions get answered in under 10 minutes by someone who has set up hundreds of tanks.
5 Everton Park #01-34B, Singapore 080005 · Open daily 11am – 8pm
