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capetsma

Fish Breeder Box Fish Hatchery Floating Fish Breeding Box with Removable Grating Perfect Fish Tank Divider for Agreesive Injured Pregnant Fishes

  • Based on 6,825 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Sep 23
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Size: L


Features

  • Safe and Upgraded Design: Made of High quality cell cast crystal acrylic, Exquisite workmanship, Inner Size for fish to swim : 9.0" x 4.7" x 5.1" ( L x W x H ),Safe and secure for breeding, isolating or acclimating fish, favorable vents allow optimum water flow and easy to observe your baby fish.
  • Must-have for pregnant fishes: This fish breeder is a Hatchery for viviparous fish, such as bettas, guppies, medaka, ect, can protect new born fry from being eaten, improve the survival rate of juvenile fish.
  • Multi-functional: This breeder box for fish tank comes with self-contained isolation plate, can reduce danger from aggressive fishes, protect injured fish, small fish, shrimp, and other sea clownfish
  • Space-saving & Self-floating: This fish isolation box can be secured to the aquarium wall with the suction cups. 2-layer combination does not occupy space.the grating in the bottom prevents soiling of the box by food residues and excrement.
  • Easy Operation: 3 mins assembly / disassemble for cleaning. (First time may take about 10 mins to remove protection layers from acrylic). Removable divider customize size and number of chambers for different needs

Description

Space for fish to swim ( S size ) : 3.9" x 2.7" x 2.3", about ¾ can of the 250ml. Space for fish to swim ( M size ) : 6.1" x 3.5" x 3.7" ( L x W x H ),you can put 2 cans in like the pic. Space for fish to swim ( L size ) : 9.0" x 4.7" x 5.1" ( L x W x H ), you can put 4 cans in like the pic. Isolate sick fishes and newborn fishes, feed them and protect them from being attacked. Improve living rate. Offer a safe room for preganent fishes, keep the new born fishes from being eaten. acclimate offensive fishes . 2mm super-slim isolation gap allows water flow, also prevent fish escaping. The balancing board and 2 handles can help keep this fish hatchery box floating on water, will not sink.

Brand: capetsma


Material: Acrylic


Tank Volume: 218 cubic centimeters


Special Feature: Lightweight


Product Dimensions: 4.7"W x 5.1"H


Item Weight: 0.26 kg


Shape: Rectangular


Specific Uses For Product: Pregnant fish protection, Aggressive fish protection, Injured fish protection


Style: Modern


Color: Blue


Product Dimensions ‏ : ‎ 11.8 x 4.7 x 5.1 inches; 9.17 ounces


Date First Available ‏ : ‎ May 14, 2019


Manufacturer ‏ : ‎ capetsma


Best Sellers Rank: #27,568 in Pet Supplies (See Top 100 in Pet Supplies) #9 in Fish Breeding Tanks


#9 in Fish Breeding Tanks:


Customer Reviews: 4.2 4.2 out of 5 stars (6,825)


Brand Name: capetsma


Included Components: suction cups


Number of Items: 1


Manufacturer: capetsma


Unit Count: 1 Count


Item Shape: Rectangular


Product Style: Modern


Color: Blue


Additional Features: Lightweight


Specific Uses For Product: Pregnant fish protection, Aggressive fish protection, Injured fish protection


Vivarium Type: Fish Breeding Tank


Pet Type: Fish


Target Species: Fish


Tank Volume: 218 cubic centimeters


Item Dimensions L x W x H: 4.7"W x 5.1"H


Item Weight: 0.26 kg


Material Type: Acrylic


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Perfect for time outs
Size: M
Review Image by Brittany
Perfect for using as a time out area for my aggressive cichlids. I don’t have another tank to put him in so this works perfect.
Reviewed in the United States on September 4, 2026 by Brittany
    • (Update: Fixed it.) Fry escaped 100% of the time
Size: S
Review Image by 07734
Review Image by 07734
Review Image by 07734
Review Image by 07734
Review Image by 07734
Update: The nylon worked! I put a knee high type nylon around the box and that did keep the fry in and they cannot escape. It's a quick, easy, and inexpensive fix. Disappointed when we waited 2 days to put the fry inside and they still were too small and escaped. I tried about 3 or 4 times to place fry inside and they escaped 100% of the time. It was smaller than expected but that's okay I suppose for my use. The suction cups work very well. Unfortunately the slits are a little too big apparently. I did read from another review to try pantyhose so I will try that tomorrow. I currently have a small Tupperware container inside the hatchery until I figure something out since the suction cups work very well. I'm glad I saw that suggestion and will try to put the hatchery inside pantyhose to see if that will stop them from escaping while still allowing water through. ... show more
Reviewed in the United States on October 13, 2020 by 07734
    • Its ok
Size: M
Review Image by Kelli
Its ok. It works. The suction cups will not let go. The lid is a pain to stay on. Really had to be put on just right. It floats but you still have to be very careful not to let it go under.
Reviewed in the United States on February 25, 2026 by Kelli
    • Great for protecting
Size: M
Review Image by Wendy
Review Image by Wendy
Perfect for my injured fish he’s approximately 4 inches and he can barely move anymore, but there is one other fish in the tank who bullies him constantly and was eating his fin so I had to get this to protect him and it’s perfect. It’s the perfect size too he can’t really move much since he’s handicapped so it gives him just enough space to get relief from the other fish. That’s a big fat bully! I like that it’s hard plastic and not mesh. It was a couple extra bucks, but it was worth it. It does have a divider if you do need to have two different fish onto different levels, but I would suggest it being only if you’re breeding and not for quarantining. ... show more
Reviewed in the United States on December 24, 2025 by Wendy
    • It’s ok
Size: S
Smaller then I expected lid do t stay on well
Reviewed in the United States on May 22, 2026 by Michelle Dias
    • Actually a decent size!
Size: L
I bought this for guppy fry that were getting too big for the dinky little breeder box I already had, but were not yet big enough to move to the six gallon aquarium I had set up as a grow-out tank. (When you put them in too big of a tank too soon, I find that they waste a lot of their energy for growing while looking for food, exploring, etc.). This box gave them twice the space of the old one, maybe more. Very easy to clean. Like most boxes of this kind with the slits on each side, I don’t trust it to provide adequate water flow. For this reason, I lift it halfway out of the water once a day to make sure toxins are not building up in the container, and let some of the uneaten food and poo flow out. The babies were a little confused by this initially, but it doesn’t really seem to stress them out. (They’re only a couple of weeks old- at this point they just think it’s normal to suddenly have half your water disappear for a moment. What do they know? Lol.). I also put a wad of Java moss and some hornwort in there so that probably two-thirds of this was basically a jungle on their scale. I highly recommend putting plenty of plants even if you just use fake ones- otherwise the bare empty container will stress the bebbies out. Finally, I put a ramshorn snail in the container to help clean up- like having a Roomba under the high chair, haha. The babies were fine in this box until about three weeks of age. They are now in their grow-out tank and doing well. I have not tried this to separate mom from babies, yet. The next lady to go into labor gets to try out the new maternity ward. But I would not even try it in anything smaller than this because putting them in tiny containers stresses them out a lot. This one, with plenty of plants in it, is large enough that it might be worth a try. I’ll update this review after I see how that goes. But, just as a nursery, this is a great little box. ... show more
Reviewed in the United States on June 25, 2022 by EAK
    • Perfect for isolating fish strong suction cups
Size: L
These are perfect for isolating a pregnant fish or a babies that you don’t want to get eaten also good for isolating an aggressive fish. Allows existing water tank flow through you don’t have to worry about a rotation, etc. are very strong and keep it against them the glass.
Reviewed in the United States on February 26, 2026 by Stunt guy
    • Fry swim right through the holes
Size: S
Review Image by Patricia
Review Image by Patricia
I ordered the small but was not expecting it to be super small. It will fit in the palm of your hand. Even thought it was really small I still used it and thought it could work. But once I put the fry in the tiny box there were holes around the bottom and the fry just swam right out. The holes are way to large even the eggs fall through the holes. The lid that goes on the top does not fit snugly if you put it even with the water line. The lid will float up and off allowing larger fish inside and the fry outside. The suction cups hold pretty good, and stays stuck on the side of the tank. If you lift the tiny box out of the water make sure there are no fish inside because all of the water drains out the bottom holes so you have to keep the little box submerged somewhat in order to keep water inside. Even though I measured the size small was super small. I must have measured wrong. It would be fine for small fish like neons or small fish like that. I have zebra fish (danios) the box was actually to small for them to turn around in. The first photo is full view of my 20 gal tank with the little box in the middle at the top. The other photo is zoomed in. Not happy with the little box at all. Its cheaper to just keep it. My first order never came and I had to get a refund and reorder. The package did arrive undamaged and item had no cracks. ... show more
Reviewed in the United States on September 15, 2019 by Patricia

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