---
product_id: 3624126
title: "Fluval Multi-Chamber Holding and Breeding Box, Large"
brand: "fluval"
price: "8599 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Fluval"
url: https://www.desertcart.is/products/3624126-fluval-multi-chamber-holding-and-breeding-box-large
store_origin: IS
region: Iceland
---

# Uses aquarium’s own water, no extra heater/filter needed Fits aquariums up to 1” thick, space-saving design 3 separate compartments for versatile fish management Fluval Multi-Chamber Holding and Breeding Box, Large

**Brand:** fluval
**Price:** 8599 kr
**Availability:** ✅ In Stock

## Summary

> 🐠 Elevate your aquarium game—because your fish deserve VIP treatment!

## Quick Answers

- **What is this?** Fluval Multi-Chamber Holding and Breeding Box, Large by fluval
- **How much does it cost?** 8599 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/3624126-fluval-multi-chamber-holding-and-breeding-box-large)

## 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

- • **Sleek Space-Saver:** Hangs externally on tanks up to 1” thick, maximizing your aquarium’s real estate
- • **Plug & Play Water Flow:** Circulates existing tank water for natural acclimation—no extra equipment required
- • **Triple-Chamber Control:** Isolate fry, sick, or new fish effortlessly with 3 secure compartments
- • **Optimized Survival Zone:** Protects vulnerable fish and fry, boosting survival rates and your aquatic success
- • **Durable & Lightweight Acrylic:** Sturdy yet easy to handle, built to last through multiple breeding cycles

## Overview

The Fluval Multi-Chamber Holding and Breeding Box is a large, acrylic breeding and isolation tank that attaches externally to aquariums up to 1” thick. Featuring three separate compartments, it allows safe separation of fry, sick, or new fish while circulating the aquarium’s own water without needing additional heaters or filters. Its compact design (10.7" x 5.7" x 5.8") holds 1.9 liters and is ideal for improving fry survival and acclimation in both fresh and saltwater setups.

## 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! - This breeding and holding box has been a fantastic addition to my aquarium setup! I really like having the option to create up to three separate compartments, which makes it incredibly versatile for isolating fish, protecting fry, or keeping smaller fish safely separated. The large size provides plenty of room without taking up excessive space in the tank, and the multi-chamber design makes managing multiple fish much easier. It feels sturdy, well-designed, and practical for breeding and quarantine needs. Definitely a great addition for any fish keeper who breeds or needs a reliable way to separate fish. Highly recommend! 🐠🐟❤️
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 |
|---------------|-------|
| ASIN | B005QRDCP2 |
| Additional Features | Lightweight |
| Best Sellers Rank | #8,078 in Pet Supplies ( See Top 100 in Pet Supplies ) #2 in Fish Breeding Tanks |
| Brand | Fluval |
| Brand Name | Fluval |
| Color | Clear |
| Customer Reviews | 4.4 out of 5 stars 6,272 Reviews |
| Global Trade Identification Number | 00015561109437 |
| Included Components | All items listed in description. |
| Item Dimensions L x W x H | 10.7"L x 5.7"W x 5.8"H |
| Item Shape | Rectangular |
| Item Type Name | Aquarium Fish Breeding Box |
| Item Weight | 1.2 pounds |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer Part Number | 10943 |
| Material | Acrylic |
| Material Type | Acrylic |
| Model Number | 10943 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Pet Type | Fish |
| Product Dimensions | 10.7"L x 5.7"W x 5.8"H |
| Product Style | Modern |
| Special Feature | Lightweight |
| Specific Uses For Product | Indoor |
| Tank Volume | 1.9 liters |
| Target Species | Fish |
| UPC | 740023371861 015561109437 |
| Unit Count | 1 Count |
| Vivarium Type | Fish Breeding Tank |

## Product Details

- **Brand:** Fluval
- **Color:** Clear
- **Item Weight:** 483 Grams
- **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 - 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!
*by A***L on August 12, 2026*

This breeding and holding box has been a fantastic addition to my aquarium setup! I really like having the option to create up to three separate compartments, which makes it incredibly versatile for isolating fish, protecting fry, or keeping smaller fish safely separated. The large size provides plenty of room without taking up excessive space in the tank, and the multi-chamber design makes managing multiple fish much easier. It feels sturdy, well-designed, and practical for breeding and quarantine needs. Definitely a great addition for any fish keeper who breeds or needs a reliable way to separate fish. Highly recommend! 🐠🐟❤️

### ⭐⭐⭐⭐⭐ 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!

### ⭐⭐⭐⭐ Put the cap on the end of the inside of the intake tube!!!
*by D***N on August 29, 2021*

It came with no instructions, but it was pretty easy to figure out. The only thing I had trouble with trying to figure out is those two tabs that go underneath where it hooks onto the tank as seen in the photo I took in between the tank and the box underneath. Still don't fully understand the purpose of those two tabs. But it's whatever it may be. Right now it's on the back of a 29 gallon. It's a great box to breed fish in, put their eggs in, act as a holding tank, or even use as a specimen container if ur looking to sell fish or examine them! And if ur wondering what those two little rubber things are, they're the clips to hold the top down if u have any aquatic friends that like to jump or escape. I see a lot of people say they have gargling or sputtering issues with the set, but mine came with a cap the has another hole on the side and I just put it on there end of the intake tube on the inside and it's as silent as can be. At least for my ears. So if urs came with a clear cap that has a hole on the side of it, stick it in there and see what it does for urs. So for the lack of instructions for everything that come with it, i give it 4 out of 5. Otherwise if it had instructions to come with it, i give it 5 out of 5! Great box!!! Definitely recommend! Oh! The air pump I have that's running it is a 3W 2 outlet adjustable air pump for the stone and the intake. Works really good! Good flow! The 2 air flow control valves, the 2 check valves, and the stone with the suction cup all came with the air pump I ordered separately with this. The purple artificial plants I ordered separately as well. I figured it'd be good to put those in to help them feel safer and hopefully be able to see them better as they move around. Also provide more surface for bio film and beneficial bacteria to grow on. I would've put real plants in but hornwort tends to grow pretty fast and it's hard to see those little white babies swim around in them. Hah So I put a small dwarf water lettuce in there instead to see how it goes. But anyways, hopefully this review will help those who are thinking about getting one of these. In my personal opinion, don't hesitate to get this because it's so versatile and u can use it for so many things other than just breeding. It's a great thing to have in ur arsenal as a fish keeper/breeder and I think everybody should have them especially if they're just starting out in the hobby. Have a nice day!!

## 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 Iceland*
*Store origin: IS*
*Last updated: 2026-09-14*