Lee Fish Net Isolation Box for Fry, Fine Mesh Aquarium Breeder

Lee’s Fish Net Isolation Box is a Net Breeder for raising fry and separating fish within an aquarium, with a fine nylon mesh net and a frame with removable, locking legs.

• Designed as a maturation tank for fry — gives young fish a dedicated area within the aquarium.
• Can isolate injured or aggressive fish — supports separation when fish need to be kept apart.
• Fine nylon mesh net — forms the netted enclosure.
• Bendable metal hangers — attach the box to the side of an aquarium.
• Engineered for water flow — helps bring oxygen and fresh water to fry.

When fry need a place to mature, or an injured or aggressive fish needs to be isolated, this in-aquarium net breeder offers a contained option that uses the aquarium’s water. Its design combines a hanging frame with a fine mesh enclosure, making it useful for fishkeepers who need a separate space without describing it as a standalone tank.

What is the Lee Net Breeder used for?

The Lee Fish Net Isolation Box is intended for fry maturation and for isolating injured or aggressive fish. These are distinct uses: it can provide a space for young fish as they mature, or help separate an individual fish within the aquarium. The design’s water flow is intended to furnish fry with oxygen and fresh water.

• Use case for young fish: maturation.
• Isolation use cases: injured fish or aggressive fish.

How does it attach to an aquarium?

Bendable metal hangers secure the box to the side of the aquarium. This hanging arrangement positions the net breeder at the aquarium wall rather than on a separate stand. The frame has removable, locking legs, so its support components can be taken off and locked into place as designed.

• Attachment point: the side of an aquarium.
• Frame details: removable legs with a locking design.

How does the net breeder support fry?

The fine nylon mesh enclosure is engineered to allow water to flow through, furnishing oxygen and fresh water to fry. That flow-focused construction is relevant when choosing an in-aquarium maturation space: the box is a net breeder, not a solid-sided isolation container.

• Enclosure material: fine nylon mesh.
• Water-flow purpose: supply oxygen and fresh water to fry.

This box suits fishkeepers seeking an in-aquarium net breeder for fry or a way to isolate an injured or aggressive fish. Its defining features are the hanging metal supports, a removable-leg frame, and a fine mesh enclosure designed for water flow.

Read our guide: Signs of illness in aquarium fish, and how to quarantine new arrivals