Best Breeding Nets and Traps for Livebearers and Fry
When your guppy, platy or molly is about to give birth, a breeding net or trap gives the fry a fighting chance of survival. Without one, adult fish will eat newborn fry within minutes. This breeding net trap aquarium guide from Gensou Aquascaping at 5 Everton Park reviews the best options for protecting and raising baby fish.
Types of Breeding Containers
Breeding Nets (Mesh Enclosures)
A fine mesh net that hangs inside your tank, allowing water to flow through while keeping fry safely contained. The mother can be placed inside before giving birth, or fry can be transferred into the net after birth. Pros: good water circulation, easy to see fry, cheap ($5–$10). Cons: limited space stresses the mother, mesh can trap tiny fry fins, reduced flow in densely stocked tanks. Best brands: Marina, Fluval, Sera.
Breeding Boxes (Plastic Containers)
Hard plastic boxes with slotted walls that hang on the tank rim or attach with suction cups. Many feature a V-shaped divider — the mother sits in the upper section, and newborn fry drop through the V-gap into a lower chamber where she cannot reach them. Pros: separates mother and fry automatically, sturdy and reusable. Cons: limited water flow (needs regular flushing), small size restricts movement. Popular options: Fluval Multi-Chamber, ISTA Breeding Box. Priced at $8–$20.
In-Tank Breeder Traps
Clear acrylic containers that sit inside the tank with adjustable water level. Some designs use air-pump-driven circulation to maintain water quality. They offer more space than hanging nets and better visibility. Brands like Ziss and Marina offer quality options at $10–$25.
Separate Fry Tank
The best option for serious breeders. A dedicated 10–20 litre tank with a pre-seeded sponge filter gives fry unlimited space, optimal water quality and no stress from adult fish. It costs more and takes up space, but survival rates are dramatically higher. Use this approach if you plan to raise fry to sellable size.
When to Use a Breeding Net
Watch for signs the mother is ready to give birth: a squared-off belly (the “gravid spot” in livebearers becomes very dark), hiding behaviour, refusing food and hovering near the surface or in corners. Transfer her to the breeding net gently. Do not keep her in the net for more than 48 hours — the confinement causes stress that can lead to premature birth, stillborn fry or the mother eating her own young from stress. If she has not given birth within 24–36 hours, release her and try again when signs intensify.
Raising Fry in a Breeding Net
Once fry are born, remove the mother immediately. Fry can stay in the breeding net for one to two weeks while they grow large enough to avoid being eaten. Feed them crushed flake, baby brine shrimp or commercial fry food three to four times daily in tiny amounts. Perform daily small water changes in the net area by swishing it gently to flush out waste. Transfer fry to the main tank or a grow-out tank once they are large enough not to fit in adult mouths — usually around 1.5–2 cm.
DIY Alternatives
In a pinch, a clean plastic food container with holes punched in the sides works as a temporary fry enclosure. Dense floating plants like Java Moss, Guppy Grass and Water Sprite provide natural hiding spots where some fry survive without any container at all. In a heavily planted tank, a portion of each litter typically survives naturally — this is nature’s way of population control.
Top Picks for Singapore
For casual livebearer keepers, the Marina Hang-On Breeding Box ($8–$12) available at most Singapore aquarium shops is reliable and easy to use. For shrimp breeders, the Ziss Breeding Box with air-driven circulation ($15–$25) maintains excellent water quality. For serious breeders, invest in a separate 20-litre fry tank with a sponge filter — the cost is minimal and the results are far superior to any in-tank solution.
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