Fluval Breeding Box 0.3 Gallon – Hang-On Aquarium Nursery

The Fluval Breeding Box 0.3 Gallon is a compact external hang-on nursery used to separate fry, eggs, shrimp, or small vulnerable fish from the main aquarium. It allows aquarium water to circulate through the box while keeping young or delicate livestock apart from larger tankmates.

This breeder box can be useful for livebearer fry, baby shrimp, egg-scattering fish projects, betta breeding setups, and short-term separation needs. It is powered by an air pump, which is sold separately unless otherwise stated.

Key Features

• 0.3 Gallon Breeding Box: Compact external nursery for fry, shrimp, eggs, and small fish
• Hang-On Design: Mounts outside the aquarium to save space inside the tank
• Uses Aquarium Water: Circulates water from the main aquarium through the box
• Good for Fry & Shrimp: Helps separate small livestock from larger tankmates
• Divider Options: Can help separate small groups when needed
• Air Pump Powered: Requires a small air pump and airline tubing for operation

Product Information

• Brand: Fluval
• Product: Breeding Box
• Capacity: 0.3 gallon
• Placement: External hang-on design
• Power Source: Air pump required
• Best For: Fry, baby shrimp, eggs, small fish, and temporary separation
• Included: Breeding box components unless otherwise stated
• Not Included: Air pump and airline tubing unless listed separately

Best Uses

• Separating livebearer fry from adult fish
• Holding baby shrimp or small shrimp temporarily
• Protecting eggs or newly hatched fry
• Short-term separation of small or vulnerable fish
• Betta breeding projects
• Egg-scattering fish breeding projects
• Acclimation or observation in some aquarium setups

How It Works

The Fluval Breeding Box hangs on the outside of the aquarium and uses air-driven water movement to circulate water from the main tank into the box. This helps keep the breeder box connected to the same water conditions as the aquarium.

Because it uses water from the main aquarium, the main tank should already be heated, filtered, cycled, and stable before using the breeding box for fry, shrimp, eggs, or small fish.

Setup & Maintenance Tips

• Use with a cycled and stable aquarium
• Connect to a small air pump with airline tubing
• Adjust flow so fry or shrimp are not pushed around too strongly
• Check the box daily for uneaten food and debris
• Feed lightly to help maintain water quality
• Clean as needed using aquarium-safe methods
• Do not overcrowd the breeding box

Frequently Asked Questions

Do I need a separate heater for the Fluval Breeding Box?
No separate heater is usually needed because the box circulates water from the main aquarium. The main aquarium should already be heated and stable if keeping tropical fish or shrimp.

Does the Fluval Breeding Box require an air pump?
Yes. A small air pump is required to move water from the main aquarium through the breeding box. Air pump and airline tubing may be sold separately.

Can I raise shrimp in this breeding box?
Yes, it can be used for baby shrimp or small shrimp temporarily. Use gentle flow and make sure food and debris do not build up inside the box.

Is the Fluval Breeding Box good for livebearer fry?
Yes. It can be used to separate guppy, molly, platy, swordtail, and Endler fry from adult fish while they grow.

Can this be used for betta fry?
It may be used for some betta breeding setups, but flow, water quality, temperature, and fry feeding needs should be monitored closely.

Can this replace a quarantine tank?
No. A breeding box can help with short-term separation or observation, but it does not replace a separate quarantine tank for sick fish or new arrivals.

Available at Tropical Treasures Wyo

The Fluval Breeding Box 0.3 Gallon is a compact external hang-on nursery for fry, shrimp, eggs, and temporary fish separation. Visit Tropical Treasures Wyo in Cheyenne, Wyoming, to shop Fluval breeder boxes, air pumps, airline tubing, sponge filters, fish food, shrimp supplies, live plants, and aquarium care essentials.

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