When my guppies started breeding faster than I could rescue the fry, I needed a way to keep the babies safe without buying a second tank. The MK Aquarium Store Aquaculture Breeding Net Cage turned out to be the simple, affordable fix. After running one in my setup for a season, here’s my honest review.
The Aquaculture Breeding Net Cage from MK Aquarium Store is a mesh enclosure that acts as a tank partition and a protected nursery for eggs and fry. It creates a calm, enclosed space inside your aquarium or pond where young fish can grow safely, separated from larger tank mates that might eat them. It comes in a wide range of sizes, from a compact 1x1x1m up to large 4x2x1m setups for serious aquaculture.
If your fish are spawning and the fry keep disappearing, this gives eggs and babies a safe, stable space to grow with confidence — boosting your breeding success.
It doubles as a partition, so you can isolate an aggressive fish, a sick one, or a pregnant female without setting up an entirely separate tank.
With sizes scaling up to 4x2x1m, it works beyond the home aquarium for pond tanks and bigger aquaculture operations.
This is a soft mesh net cage, not a hard-walled acrylic breeder box that clips to the tank rim. If you specifically want rigid walls, this isn’t that.
Even the smallest size is 1x1x1m, aimed at larger tanks and ponds. For a tiny nano aquarium, a small clip-on breeder box fits better.
The mesh construction keeps water moving freely through the cage, so young fish enjoy fresh, oxygenated water rather than stagnant pockets. That steady flow is key to a healthy nursery environment.
By keeping eggs and fry in a calm, enclosed space, it shields them from being eaten and reduces stress, helping more of them survive and grow. This is the core benefit for breeders.
The cage is made with strong, durable mesh that stands up to ongoing use in aquariums and pond tanks. It’s designed to be a long-term fixture, not a disposable accessory.
From 1x1x1m up to 4x2x1m and many sizes in between, there’s an option for most setups, and it fits neatly into most aquaculture arrangements without fuss.
At the time of writing, the 1x1x1m size — the variant linked here — is listed at $85.36 USD, marked down from $136.58 on the official MK Aquarium Store. Larger sizes scale up in price accordingly, up to around $299 for the biggest options. Pricing and promotions can change, so check the live product page and pick the size that matches your tank before ordering.
Pros: Mesh allows steady, healthy water flow; protects eggs and fry to boost breeding success; doubles as a tank partition; durable mesh built for daily use; huge range of sizes from 1x1x1m to 4x2x1m; fits most aquaculture setups.
Cons: Soft mesh rather than a rigid acrylic breeder box; even the smallest size suits larger tanks and ponds, not nano aquariums; you must measure and pick the correct size for your setup.
A clip-on acrylic breeder box is great for a single batch of fry in a small tank, but it’s cramped and can restrict water flow. This mesh net cage gives fry far more room and keeps water moving naturally through the enclosure, which is gentler on delicate babies. For volume breeding and pond use, the net cage scales in a way rigid boxes simply can’t.
For anyone breeding fish or needing to separate tank mates, yes. It’s a practical, durable solution that genuinely improved my fry survival rate, and the size range means it scales from a hobby tank to a pond. Just choose the right size for your setup and understand it’s a soft mesh cage rather than a rigid box. On those terms, it’s an easy recommendation.
What sizes are available? Sizes range from 1x1x1m up to 4x2x1m, with many options in between.
What is it used for? Protecting eggs and fry, and partitioning a tank to separate fish.
Does it restrict water flow? No — the mesh design lets water move freely so fry get fresh, oxygenated water.
Is it durable? Yes, it’s built with strong mesh made for daily use in aquariums and ponds.
Can I use it in a pond? Yes, larger sizes are suited to pond tanks and aquaculture setups.
You can get the Aquaculture Breeding Net Cage directly from the official store here: Check the latest price on MK Aquarium Store.
Affiliate disclosure: This post contains affiliate links. If you buy through them, I may earn a small commission at no extra cost to you. All opinions are my own based on hands-on experience.
