---
product_id: 3624126
title: "Fluval Multi-Chamber Holding and Breeding Box, Large – Up To 3 Separate Housing Compartments"
brand: "fluval"
price: "C$3326"
currency: NIO
in_stock: true
reviews_count: 8
category: "Fluval"
url: https://www.desertcart.ni/products/3624126-fluval-multi-chamber-holding-and-breeding-box-large-up-to
store_origin: NI
region: Nicaragua
---

# Uses aquarium’s own water flow Fits aquariums up to 1" thick 3 separate compartments Fluval Multi-Chamber Holding and Breeding Box, Large – Up To 3 Separate Housing Compartments

**Brand:** fluval
**Price:** C$3326
**Availability:** ✅ In Stock

## Summary

> 🐠 Elevate your fish care game with triple-chamber precision!

## Quick Answers

- **What is this?** Fluval Multi-Chamber Holding and Breeding Box, Large – Up To 3 Separate Housing Compartments by fluval
- **How much does it cost?** C$3326 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/3624126-fluval-multi-chamber-holding-and-breeding-box-large-up-to)

## Best For

- fluval enthusiasts

## Why This Product

- Trusted fluval brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Convenient:** Space-saving design with easy access for feeding and maintenance
- • **Triple-Chamber Control:** Up to 3 separate compartments for fry, sick, or new fish isolation
- • **Natural Water Circulation:** Utilizes existing aquarium water flow—no extra heater or filter needed
- • **Seamless Aquarium Integration:** Easily attaches to tanks up to 1" thick without sacrificing tank space
- • **Versatile Fresh & Saltwater Use:** Perfect for all aquarium types, enhancing survival and acclimation rates

## Overview

The Fluval Multi-Chamber Holding and Breeding Box is a lightweight acrylic accessory designed to attach externally to most aquariums up to 1" thick. It features three separate compartments, each holding up to 0.5 gallons (1.9 L) of water, providing a safe, space-efficient environment for breeding, isolating, or acclimating fish. Leveraging your aquarium’s existing water circulation, it requires no additional heaters or filters and is compatible with both fresh and saltwater setups, making it an essential tool for serious aquarists focused on maximizing fry survival and fish health.

## Description

The Fluval Multi-Chamber Holding and Breeding Box is ideal for those looking for a convenient way to separate fish from the tank. This is usually done during breeding and as a maturation tank for young fry; but there are other times when fish may need to be isolated. This box does this without taking up space in the tank. Keeping perfect aquatic harmony has never been easier.

Review: Great Breeder Box for Raising Fry - This breeder box has been perfect for raising my celestial pearl danio fry. It was easy to assemble, and I really appreciate how simple it is to access the inside for both feeding and cleaning. I did make a small modification by adding a sponge to the return since the provided grates were a bit too large and could allow fry to slip through. With that adjustment, it works wonderfully. Overall, I highly recommend this breeder box for anyone raising fry.
Review: Fantastic breeder box that needed some modifications on my end. - So I've bred peacock gudgeons and hatched most of the eggs within this container. It was attached to its own little 5 gallon tank with a HOB with carbon and extra sponge for proper filtration, keeping nitrate and nitrite at 0 despite the several-times-a-day feedings. The box definitely has potential to turn your fry container into a fry washing machine, little guys get tumbled around from the flow. The little adjuster on the airline itself did nothing for me, so I had mine hooked up to the system of my rack that let me change airflow directly from the pump. Had to lower that a decent chunk, otherwise the water flow was simply too strong. Even with that, I put some aquarium sponge on a little skewer and placed it right under the water output to catch most of the impact. I also added a piece of sponge on the outflow, because the little grate it comes with is just too big. My little fry kept escaping. I eventually learned that my fry are even small enough to go into and through the damn sponge I put in there, so I had to use something finer (which clogged easier). I also added some floaters and java moss to help with both filtration and hiding space for my little buggers. Unless you have fry that's too big to go through the little grate you definitely will need modifications. But besides all that, it's a fantastic option for hatching eggs and raising fry. My little guys are by now big enough to swim in the 5g freely while growing a little more without risk of ending up in the HOB. Given how well this entire setup worked for me I'll be getting more in the future. I've yet to try it for egg scatterers along with the one item from I believe penplax for automatic egg-harvesting, but I'll get there. And for that I'll need another one! I definitely can recommend it. It kept all my fry in a small space meaning I could give them more accurate feedings, and hook it up to its own tank to have a big water volume for great parameters. Amazing!

## Features

- Compatible with Most Aquariums: Easily attaching to the side of most aquariums up to 1” thick, the Multi-Chamber Holding & Breeding Box provides up to 3 separate compartments for protecting fry, sick/weak fish or new fish that require acclimation.
- Required Parts: Please note that this multi-chamber will require an Air Pump (1 L/per minute) and Airline Tubing, both of which are sold separately.
- Usage: Ideal as a hatchery and incubator to help protect newborn fry from being eaten (which improves survival rate). Provides a safe haven for injured or weak fish. Helps acclimate new fish as water circulates from the aquarium
- Space-Saving: This chamber’s design measures 10.25″ L x 5.5″ W x 4.75″ H (26 x 14 x 12 cm) and holds 0.5 US Gal (1.9 L) of water. Hangs onto aquarium exterior for easily observing fish and convenient maintenance.
- Versatile: Utilizes the same conditioned water as your aquarium, no additional heater or filter required. Can be used with fresh and saltwater aquariums.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Fluval |
| Customer Reviews | 4.3 out of 5 stars 6,013 Reviews |
| Item Weight | 1.2 Pounds |
| Material | Acrylic |
| Product Dimensions | 10.7"L x 5.7"W x 5.8"H |
| Special Feature | Lightweight |
| Tank Volume | 1.9 Liters |

## Product Details

- **Brand:** Marina
- **Color:** Clear
- **Item Weight:** 1.2 Pounds
- **Material:** Acrylic
- **Product Dimensions:** 10.7"L x 5.7"W x 5.8"H
- **Shape:** Rectangular
- **Special Feature:** Lightweight
- **Specific Uses For Product:** Indoor
- **Style:** Modern
- **Tank Volume:** 1.9 Liters

## Images

![Fluval Multi-Chamber Holding and Breeding Box, Large – Up To 3 Separate Housing Compartments - Image 1](https://m.media-amazon.com/images/I/61HRvKlIj-L.jpg)

## Available Options

This product comes in different **Customer Package Type, Size** options.

## Questions & Answers

**Q: What are the dimensions of the box?**
A: 6.5"L x 5"H x 3.5"W.  If you include the part that hangs on to the tank the width is 5".  You can only fill water up to a height of 4" before the water spills back into the tank in the overflow channel.

**Q: how do I separate mama guppy and babies? it seems different with the medium size breeding box and I am so confused how it works...**
A: Apparently the sizes are not being represented correctly by Amazon. The small through medium versions are actual breeder boxes where pregnant female can give birth and the fry it seperate by a v birth gravity fed system to seperate the fry from the mom. The large breeding box can be used as isolation fry raising rearing or to breed fish in it in a confined space where males can fertilize the females. The large comes with 2 dividers to create 3 seperate housing area to grow out fry. I was Lao misled about this thinking all the sizes were the same but small and medium are one type and large is used as an external isolation tank. Hope this helps future buyers. I know amazon gets picky when you return things and has threatened to close my account over it but when a big company like this doesn't know the product it's actually selling and groups it together with all sizes it will create confusion to the consumer and in turn we get penalized for it or may have to pay return shipping. Those return shipping fees are the price of this plastic so it's not worth it to return. Nice product but now I need to buy a medium also because it's really what I needed with a very birth chamber to seperate fry from being eaten. Sucks wasted money.

**Q: What's to stop the fry from washing into the main tank with the returning water?**
A: You must place a piece of sponge on the intake and in front of the grate of the water return to guarantee the safety of the fry.

**Q: Can mollies fit in the small breeder box**
A: yes they can, not many of them though. we kept our fish in their regular tank and once the female mollies were pregnant we moved the pregnant ones to the breeder box only about 2-3 of them. It is pretty small.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Breeder Box for Raising Fry
*by K***M on September 25, 2025*

This breeder box has been perfect for raising my celestial pearl danio fry. It was easy to assemble, and I really appreciate how simple it is to access the inside for both feeding and cleaning. I did make a small modification by adding a sponge to the return since the provided grates were a bit too large and could allow fry to slip through. With that adjustment, it works wonderfully. Overall, I highly recommend this breeder box for anyone raising fry.

### ⭐⭐⭐⭐⭐ Fantastic breeder box that needed some modifications on my end.
*by A***A on June 11, 2024*

So I've bred peacock gudgeons and hatched most of the eggs within this container. It was attached to its own little 5 gallon tank with a HOB with carbon and extra sponge for proper filtration, keeping nitrate and nitrite at 0 despite the several-times-a-day feedings. The box definitely has potential to turn your fry container into a fry washing machine, little guys get tumbled around from the flow. The little adjuster on the airline itself did nothing for me, so I had mine hooked up to the system of my rack that let me change airflow directly from the pump. Had to lower that a decent chunk, otherwise the water flow was simply too strong. Even with that, I put some aquarium sponge on a little skewer and placed it right under the water output to catch most of the impact. I also added a piece of sponge on the outflow, because the little grate it comes with is just too big. My little fry kept escaping. I eventually learned that my fry are even small enough to go into and through the damn sponge I put in there, so I had to use something finer (which clogged easier). I also added some floaters and java moss to help with both filtration and hiding space for my little buggers. Unless you have fry that's too big to go through the little grate you definitely will need modifications. But besides all that, it's a fantastic option for hatching eggs and raising fry. My little guys are by now big enough to swim in the 5g freely while growing a little more without risk of ending up in the HOB. Given how well this entire setup worked for me I'll be getting more in the future. I've yet to try it for egg scatterers along with the one item from I believe penplax for automatic egg-harvesting, but I'll get there. And for that I'll need another one! I definitely can recommend it. It kept all my fry in a small space meaning I could give them more accurate feedings, and hook it up to its own tank to have a big water volume for great parameters. Amazing!

### ⭐⭐⭐⭐ Great product with multiple uses
*by M***L on June 10, 2024*

I've been using the 0.5 gallon breeder box for a few months now and it has worked really well so far. I use it for drip acclimation, as a holding tank for new fish/shrimp, and as a breeding tank to raise fry. It is very convenient, efficient, and easy to set up. Many of the negative reviews mention the little gate piece allowing fry to escape into the main tank. This is easily remedied by adding a piece of sponge filter in front of the gate. It is a little bit on the noisy side, but I actually enjoy the sounds of bubbles and trickling water. Other than that, the only two issues I have is that the the male connection to the airline tubing can get clogged with bacteria/biofilm which reduces the flow. This can be fixed by simply cleaning it with a test tube brush. Flow is also reduced if the water level in the main tank is lower, so just keep that in mind. The other issue is that waste can accumilate on the bottom of the chamber and it is not efficiently removed. I say this because all of my cory catfish fry died presumably because of the excess bacteria buildup on the bottom of the chamber. However, I probably overfed with first bites and didn't do a good job of siphoning out the waste. Despite these potential drawbacks, I believe that this breeder box is the best on the market.

## Frequently Bought Together

- Fluval Multi-Chamber Holding and Breeding Box, Large – Up To 3 Separate Housing Compartments
- Ultra Fresh Baby Fish Food with 50% Sword Prawn Shrimp, Slow Sinking, Substitute for Brine Shrimp - For Fry Health and Cleaner Water
- Tiny Fry Fish Food 1.76 oz, Fine Powder for Newborn Aquarium Fish

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-01-29*