Best Fish Breeder Boxes of 2025

"I used this to acclimate my female betta into my aquarium. It worked well but was definitely a temporary solution. I found she was a little aggressive while in the breeder box, probably because it was too small. After a week, I added her to the rest of the tank, and luckily, she got along with the other fish."

"I recently purchased the Pawfly Aquarium Fish Breeding Box (Small size) and I am thrilled with its performance. The design allows for great ventilation and water flow, essential for the health of both adult fish and fry. Cleaning is a breeze, and it prevents fry loss with its clever design."

"Now I understand why my aquarium peers recommend Pawfly products! This breeder box is exceptionally made and allows for perfect water passage. I can't wait to try out the bigger sizes!"

"I absolutely love this box! It looks so much better than the mesh ones I had before. The separator for the mom and fry is fantastic, and the leveling tool to ensure sturdiness is a nice touch. Additionally, the slot to cover the outlet helps prevent fry from getting flushed back into the tank."

"This product has been a game changer for me. I was able to hatch peacock gudgeons successfully using it. It connects well to my own tank setup, and despite some adjustments to the airflow, my fry are thriving. I highly recommend it for anyone looking to raise fry efficiently."

"Using this as a grow-out box for my African cichlid fry is working wonderfully. It took me only about ten minutes to assemble, and I appreciate the dividers. While some mentioned the gurgling noise, it hasn’t bothered me much. Just be sure to clean it regularly to avoid ammonia buildup."

“I found it easy to use and install in my tank for separating baby fish. It fits a 10-gallon tank nicely, but I recommend moving to a larger tank soon to give them more space. It's sturdy and good quality, and the suction cups hold well. I had no issues with other fish, and it came with two units. Assembly was a quick and easy process.”

“I ordered two larger sizes to help separate fish that were getting picked on. This product is infinitely better than using a floating cup. The water flow allows for a full tank experience, which is great for the fish. It was easy to put together, but I wish it came with more suction cups since only two are included for six tabs. Despite that, it’s been a great investment for helping my fish recover without needing a hospital tank.”

“I tried using these for my snail babies, and while putting it together was straightforward, I noticed a few issues. The base of the frame isn't flat due to plastic bumps, which I plan to sand down. Plus, the mesh design allows my snails to crawl around the frame, and I think it needs to be glued. Overall, I feel it could work better for other creatures, but I’m still looking for a good breeder box for my snails.”

"I found the breeder box easy to set up and it has really helped me keep my guppy fry safe as they grow."

"This product is perfect for my peacock gudgeons! It was a breeze to assemble and the suction is strong, making it secure in my tank."

"I ordered this box quickly for my pregnant guppy, and I’m so glad I did! It's of great quality for the price, easy to put together, and the size fits perfectly for small fish."

"I've used this box for three pregnant platy fish and it has worked great each time. I was worried about the babies squeezing out, but thankfully, none have. Assembly was straightforward, with just a few pieces to put together. The size is decent for the fry, but I recommend a separate grow-out tank for them later on. My only concern is that the divider between the top and bottom sections isn’t very secure unless the side divider is in place."

"This product is perfect for isolating aggressive fish during feeding. However, I found that it doesn't isolate sick fish effectively since water flows through the slats. The suction cups are a bit challenging to detach, but overall it's a decent solution for what I need."

"I wanted to protect my aquarium plants from my goldfish, and this box did the trick! It’s durable and has stayed secure even when the goldfish bump into it. The optional divider is a great feature, and after a month of use, it still works perfectly. I highly recommend it!"

“I was initially skeptical due to mixed reviews, but this product worked perfectly for me. Everything fit together snugly—no rubber bands needed! The only minor issue was that the connecting tube was a bit too long, causing a kink. I trimmed it easily with scissors. The suction was almost perfect, and the fry were safely drawn away from mom. Over two weeks, I experienced zero mortality among the fry. This design is excellent for ensuring their health and safety!”

“I found this to be amazing for saving live-bearing fry. I simply attached a control valve to the airline, and it worked perfectly. Great value, and I ended up purchasing a second one!”

“The actual nursery doesn’t float as expected, and all the parts that shouldn’t float do. Nothing stays clipped together, which was disappointing. I thought about repurposing it, but ultimately, it turned out to be just a $20 piece of junk.”

“I really like the simplicity and size of this breeding box. It's pretty durable, although I'm curious about the long-term durability of the rubber bands in water. The holes and slots are evenly cut, and I don't share the concerns others have about unfinished edges. While the directions could use some improvement, they weren't necessary for me. I almost overlooked the hangers in the packaging because the paper matched the box color. They don't fit my rimmed 125-gallon tank perfectly, but they work for most. Overall, it's a good value and serves its purpose well.”

“I was looking for a couple of breeding boxes, and this one is perfect! It's very compact and adorable, with crystal clear acrylic and perfectly sized holes.”

“The assembly was quick and easy, but peeling off the protective tape took me forever! However, I'd rather deal with that than receive a scratched product.”

“I needed a space for my prego guppy and this arrived just in time. It worked perfectly, allowing her to give birth safely without the bigger fish bothering the babies. I now have 8 baby guppies swimming happily! This is a must-have for anyone with guppy moms.”

“This box was a great upgrade for my guppy fry. It gave them twice the space of my previous box, and I appreciated how easy it is to clean. I do lift it out daily to ensure good water flow, but overall, it's been a great addition to their nursery.”

“I bought this box mainly for isolating fish and it fits well in my tank. I noticed that the slits are a bit large, so small fry can slip through. However, I find it effective for temporarily keeping fish I want to cull. Adding an air stone helps keep the water fresh.”

"I have a small 2 gallon tank and needed a small floating separator for a bully fish. This fits perfectly and floats without suction cups. It works great for my needs!"

"I got this for my mystery snails but was shocked to wake up to over 60 guppy fry! I managed to scoop out about 30 and take them to the local fish store. This breeder box is perfect, sturdy, and ensures that neither the snails nor guppies can escape!"

"I really wish I liked this product, but it felt like poor quality plastic. I ordered it twice and both times, it arrived cracked. I should have listened to the reviews and saved myself the trouble!"

"The plastic is extremely thin and the side slats are too far apart, allowing the little fry to swim right through. When it arrived, I found it already broken, even though the packing box was undamaged."

"After using three of these breeder boxes, I noticed that they were broken after a couple of uses. Now, I'm just using one to hold plants in my aquarium. Also, the suction isn't holding well."

"I had two female fancy guppies give birth in these boxes, but sadly, 90% of the fry escaped and were eaten by other fish. I'm absolutely devastated by this experience."