Fluval Hang-On Breeding Box Large
Easily attaching to the side of most aquariums up to 1″ thick, the Fluval Multi-Chamber Holding & Breeding Box provides up to 3 separate housing compartments for protecting fry, sick/weak fish or new fish that require acclimation.
Key Features
- Multi-functional breeder box allows for 1, 2 or 3 separate housing compartments
- Ideal as a hatchery and incubator to help protect new born fry from being eaten (improves survival rate)
- Provides a safe haven for injured or weak fish
- Helps acclimate new fish as water circulates throughout box from aquarium
- Hangs onto aquarium exterior for easily observing fish and convenient maintenance
- Space-saving design – measures 10.25″ L x 5.5″ W x 4.75″ H (26 x 14 x 12 cm)
| Dimensions | 10.25″ L x 5.5″ W x 4.75″ H |
|---|---|
| Material | Plastic |
| Compatibility | Aquariums up to 1″ thick |
FAQ
Can this breeding box be used for acclimating new fish?
Yes, the box helps acclimate new fish as water circulates from the main aquarium, allowing gradual adjustment to new water conditions.
How many compartments does the box have?
The box provides up to 3 separate housing compartments, which can be used individually or combined depending on needs.
Is the box easy to install and remove?
Yes, it attaches securely to the side of most aquariums up to 1″ thick and can be easily removed for cleaning or maintenance.

Joanne Abraham –
This breeding box has been a game changer for my fry survival rate. I used it to protect newborn guppies and the fry stayed safe from being eaten by adult fish. The compartments are easy to manage and the water flow helps with acclimation. Simple to install and clean.
Frank Mills –
Great for keeping weak fish safe while I adjust their water conditions. The box hangs neatly on the side and I can monitor them without disturbing the main tank. I use it for both fry and sick fish, and it’s very reliable.
Cameron Grant –
I’ve used this box for over a year now and it still works perfectly. The three compartments allow me to separate different fish groups. It’s a must-have for any aquarium with fry or new arrivals.