capetsma Fish Breeding Box, Acrylic Fish Isolation Box with Suction Cups, Aquarium Acclimation Hatchery Incubator for Baby Fishes Shrimp Clownfish and Guppy... Small Size (S)

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.

The small is SMALL. One of my Neon Tetras fell ill so I needed an isolation box for it. It comes with a divider, since the purpose is for breeding. Honestly I feel like one small fish can fit comfortably. The quality of this product is really nice as well, had no issue with it staying in place on my 20 gal tank.

I didn’t upload any photo because I didn’t want to edit my device settings for photo access but it looks just like the photos depicted its small but it worked well, the suction cups were not initially attached and thus i never used them. I did at some times tape the lid on incase it somehow sunk. Unless strong or determined or multiple fish are looking to be free that shouldn’t be necessary. It worked well overall. the middle layer divider only stayed down well when the little bar divider was also in place below it which was fine. I often didn’t need to use those pieces as I was using it for isolating a aggressive fish or introduction of new fish. I had tried having pregnant fish in there but I never timed it right and I felt bad for them and let them out each time I’d put one of the super pregnant appearing guppies in there after they didn’t give birth within some timeframe of good length. I did however later use the container to hold the baby fry guppies after the fish gave birth in the main tank area and I put some live plants in and it held 20 fry easily and none appear to be able to get out. I’ve seen them try. I had premature baby fry in the main tank at times they were like a piece of teeny broken lead from a mechanical pencil. Those aren’t what they should look like and while I separated out into another container those ultimately died and likely would’ve been able to swim through the cracks. When the fry are born healthily they’re a bit bigger than a piece of rice and clearly visible and cannot get through this container. I did need to move out the fry to clean out food that got gross after a couple days. Can’t say if any pregnant fish would give birth in there. I would say if you move them midway through once they start they’ll likely continue; it would help if it’s not the fish’s first time giving birth as its overall less stressful for the fish.

Absolutely perfect for guppies. I have had trouble finding something with small enough slots that the fry don’t fall through and this does the trick. I have 2 of them in a 10 gallon for my 3 females and it’s perfect. I also like that it actually fits together; some of the breeding boxes have floating interior parts and this doesn’t.

This is a fairly decent product. My only issue is that the wholes are too big for my danio eggs/embryos meaning they can easily escape into the main tank quickly drawing more attention to the box and ultimately becoming prey.Once I saw the fish swarming around the box and saw one escape all I could find to quickly resolve the issue was wrapping a clear plastic shower cap around the sides and bottom.It helped but now I have a few tiny fry stuck between the cap and the box :-(Honestly, with the large, I wouldn’t even put a few day old black mollies in there.The box is great for isolation of bigger (youth/adult size fish such as mollies, guppies, etc) though!! Just be careful if you choose to actually use it as a “breeder” box.At one point, I even had black mollies eating the contents of the box through the holes on the side :-(