--- product_id: 6692530 title: "Fluval Multi-Chamber Holding and Breeding Box, Medium" brand: "fluval" price: "Β£21.47" currency: GBP in_stock: true reviews_count: 13 category: "Fluval" url: https://www.desertcart.co.uk/products/6692530-fluval-multi-chamber-holding-and-breeding-box-medium store_origin: GB region: United Kingdom --- # 0.3 gallons (1.9L) capacity Compact 6.8" x 5.2" x 5.3" footprint Secure multi-chamber isolation Fluval Multi-Chamber Holding and Breeding Box, Medium **Brand:** fluval **Price:** Β£21.47 **Availability:** βœ… In Stock ## Summary > 🐠 Elevate your aquarium game with sleek, secure breeding mastery! ## Quick Answers - **What is this?** Fluval Multi-Chamber Holding and Breeding Box, Medium by fluval - **How much does it cost?** Β£21.47 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/6692530-fluval-multi-chamber-holding-and-breeding-box-medium) ## 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 - β€’ **Space-Smart Design:** Hangs externally to maximize your aquarium’s living space without clutter. - β€’ **Durable Tempered Glass:** Robust, lightweight construction built to last and showcase your fish clearly. - β€’ **Effortless Maintenance:** Easy access for feeding and cleaning keeps your aquatic environment pristine. - β€’ **Precision Breeding Control:** Multi-chamber setup ensures safe separation and optimal fry development. - β€’ **Flow-Optimized Water Exchange:** Adjustable intake and discharge system maintains perfect water circulation quietly. ## Overview The Fluval Multi-Chamber Holding and Breeding Box (Medium) is a premium, space-saving aquarium accessory designed for professional fish breeders and enthusiasts. Crafted from durable tempered glass, it offers a secure multi-chamber environment with a 0.3-gallon capacity, hanging externally to preserve tank space. Its adjustable water flow system and easy access features make breeding, isolating, and acclimating fish effortless and efficient, ensuring healthy fry development and aquatic harmony. ## Description The Fluval Multi-Chamber Holding & 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: Don't put your flow too high. Use the correct angle. - So as you see in my video I have experience with the small, and now I own the large version of this breeder box. It works great. Some reviews say people had issues. As you see, it doesn't leak and the pegs didn't break off like some others said. The pegs add and remove leverage so that it can sit correctly. You want it to be aligned perpendicular with the rim of your tank or if anything SLIGHTLY angled downward INTO the tank. You do not want the bottom of the breeder box to be pushed out from the tank. I could see that as a reason why the pegs would break for some people. You don't want the bottom too far in. I could see that causing the box to leak from the front but I dont see how that could ruin your marriage. I have my pegs on number 4 but the glass and rim is thick on my 75 gallon. Front of the breeder box should be more or less parallel with the tank. Don't put your flow too high. I have a constant drip. Maybe 1 to 4 drops per second but it needs to be dripping into the box constantly. It gives a small stream from the slit and a constant drip into the aquarium. It doesn't make lots of noise. I haven't had issues with this method in 2 years. This combined with my egg incubator is invaluable when it comes to preserving numbers. The small version does not have a lock. I don't use the lock on the big one. I dont like the design of it. I didn't need instructions because I'm not incompetent but some people may need them. ## Features - Safe & secure tank for breeding, isolating or acclimating fish - Multi-purpose use - Space saving design - Hangs on the outside of the aquarium - 0.3 gallons ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005QRDDJ2 | | Additional Features | Lightweight | | Best Sellers Rank | #8,812 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 6,205 Reviews | | Global Trade Identification Number | 00015561109420 | | Included Components | Breeding box with cover, Intake tube, V-shape separator, Leveling adjuster, Air valve, Airline tube 12" (30 cm), Discharge cap, Intake extension, O-Ring, Strainer, 2 x Slit plates for discharging water (1 thick frame - 3 bars, 1 thin frame - 5 bars) | | Item Dimensions L x W x H | 6.8"L x 5.2"W x 5.3"H | | Item Shape | Rectangular | | Item Type Name | Breeding Box | | Item Weight | 0.7 Pounds | | Manufacturer | Rolf C. Hagen (USA) Corp. | | Manufacturer Part Number | 10942 | | Material | Tempered Glass | | Material Type | Tempered Glass | | Model Number | 10942 | | Pet Type | Fish | | Product Dimensions | 6.8"L x 5.2"W x 5.3"H | | Product Style | Modern | | Set Name | Fluval Multi-Chamber Breeding Box Set | | Special Feature | Lightweight | | Specific Uses For Product | Indoor | | Tank Volume | 1.9 Liters | | Target Species | Fish | | UPC | 015561109420 | | Unit Count | 1 Count | | Vivarium Type | Fish Breeding Tank | ## Product Details - **Brand:** Fluval - **Color:** Clear - **Item Weight:** 0.7 Pounds - **Material:** Tempered Glass - **Product Dimensions:** 6.8"L x 5.2"W x 5.3"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, Medium - Image 1](https://m.media-amazon.com/images/I/71taM+M+UYL.jpg) ## Available Options This product comes in different **Customer Package Type, Size** options. ## 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. ### ⭐⭐⭐⭐⭐ Don't put your flow too high. Use the correct angle. *by T***Y on August 4, 2025* So as you see in my video I have experience with the small, and now I own the large version of this breeder box. It works great. Some reviews say people had issues. As you see, it doesn't leak and the pegs didn't break off like some others said. The pegs add and remove leverage so that it can sit correctly. You want it to be aligned perpendicular with the rim of your tank or if anything SLIGHTLY angled downward INTO the tank. You do not want the bottom of the breeder box to be pushed out from the tank. I could see that as a reason why the pegs would break for some people. You don't want the bottom too far in. I could see that causing the box to leak from the front but I dont see how that could ruin your marriage. I have my pegs on number 4 but the glass and rim is thick on my 75 gallon. Front of the breeder box should be more or less parallel with the tank. Don't put your flow too high. I have a constant drip. Maybe 1 to 4 drops per second but it needs to be dripping into the box constantly. It gives a small stream from the slit and a constant drip into the aquarium. It doesn't make lots of noise. I haven't had issues with this method in 2 years. This combined with my egg incubator is invaluable when it comes to preserving numbers. The small version does not have a lock. I don't use the lock on the big one. I dont like the design of it. I didn't need instructions because I'm not incompetent but some people may need them. ### ⭐⭐⭐⭐ Great, if you fix the sputtering *by A***S on October 9, 2017* Are you like me where bubbling water doesn't bother you but sputtering water and splashing does? I ask this because if you follow the instructions of this breeding box you'll hear loud, obnoxious sputtering. I'm not quite sure why it sputters the way it does, but it was driving me crazy. So this is what I did. In the instructions, you'll see two parts, Intake Tube (9) and Discharge Cap (8). Follow the instructions in putting the breeding box together, but then do the following if the sputtering noise bothers you like it did me. Throw out the Discharge cap. Feed a three inch or so piece of airline tubing into the top part of the Intake Tube where the Discharge cap would normally be affixed. Just feed it enough to be secure. Place the other end of the airline tubing into the water of the breeding box. You'll get bubbling instead of sputtering, which for me is realms more tolerable. Other than that this is a great little box. I use it as a half semi filter, half moss and shrimp storage. Edit: By the way, when you make the fix above, make sure the airline tubing you use isn't too long. Too long and the water struggles to make it up U turn of the Intake Tube, which causes it to act like just an airpump, instead of pulling water from the main tank in. If this happens and you don't realize it can be quite bad. For instance, if your house is cold and your tank warm, the pump won't bring the warm water from the main tank into the breeding box, so the temperature will drop heavily. That's bad. You'll also be dealing with only the water volume of the box instead of the water volume of the whole tank, which is also bad. So say you have this breeder box on a 10 or a 20 gallon, and you fix it incorrectly so that it's only bringing air into the box, then you've only got the water quality of the box, which is tiny. So make sure that both water is making it into the box and that water is exiting the box through the overflow (it should at least drip constantly). ## Frequently Bought Together - Fluval Multi-Chamber Holding and Breeding Box, Medium - Penn-Plax AN2 Aqua Nursery and Hatchery Breeding Box for Your Aquarium - Help Protect Baby Fish from Predators - SAVITA 6 Pieces 13x10.24in 7 Count Plastic Needlepoint Canvas White Plastic mesh Sheets for Embroidery Crafting and Knit and Crochet Projects --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/6692530-fluval-multi-chamber-holding-and-breeding-box-medium](https://www.desertcart.co.uk/products/6692530-fluval-multi-chamber-holding-and-breeding-box-medium) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-23*