Small Breeder

I really like this fish breeder. It is large enough for fish bigger than guppies. Easily accommodates two Molly's, swords or platy fish. The little air tube connection on the side is a nice addition too. It is a bit difficult to disconnect the bottom from the top, but I have had others that came apart too easily, so this is better. It is also a bit tricky to set the divider in place that keeps the babies below, but not hard. I have found one very unique use for it though. I actually put it in my 10 gallon baby fry tank. I simply took off the bottom of it, below the divider that allows the baby fry through and keeps the mom out. Instead of catching babies, I simply leave the mom in the top piece. The babies fall through the cracks like they are supposed to, but they fall right into the baby tank. It is awesome! No trying to get mom back out while trying to keep babies in. No more babies swimming back up the cracks and getten eaten by mom. I also run an air tube in the air hole / pipe. That way the water still flows nicely in where mom is. This keeps her area better airated and actually helps flow the babies out. After the mom is finished having the fry I just pull out the entire box and move her back to the community tank. The only problem that I have run into is that the suction cups sit too far in and behind. They are impossible to reach once it it attached.

Used these for a few weeks while my fry were growing. Then they went to general population. Working as intended

Here's my so-so experience with the Petzilla Breeder Box after 4 months... -Suction cups come loose from glass quite often (other brand never did that). This results in fry escaping into main tank, and adult fish entering box and feasting on the fry. And no, I didn't have the lid on. Maybe that would've prevented it, maybe not. -Lid sticks...a giant pain at feeding time. Hard to remove lid without having to stick fingers in tank and really work it loose. Holes are difficult to fit food through. Can be done, need good aim. Used w/o lid. -The 3 corner tubes that are "closed" will allow fry to rest on them. Fine unless the water level gets too low. On occasion my fry got stuck on top of the tubes and became fish out of water and didn't survive. -The open corner tube used for aeration...I chose not to connect an air supply, thus the fish swim down into the tube. Fine if water level is above the rim, but if it lowers, fry get stuck in the tube and can asphyxiate...as mine did. Also, food and debris accumulates in that tube. -Tabs that connect top and bottom half are VERY difficult to open. In fact, required a knife point to seperate tab, and takes lotsa shimmying to seperate top and bottom half. Ironically, one tab broke recently from using thumb pressure, not the knife. -If you "pour" the fry into another container to clean tank or box, the fry get stuck between lip b/t top and bottom half AND stuck in the tubes! PANIC mode sets it...Then you try to get the tabs loose to separate and you can't....you end up w/fish out of water, fish stuck, stressful for the fish AND you. -Tray that separates mom and fry...hard to get to stay in place. Once you do it works nicely. Fry drop down and mom is seperate. However, once mom removed, and you want to remove tray...GL! You'll need to seperate the top and bottom halves to remove and that is a challenge. Overall, it's merely a fair product.

Size is acceptable to be called large. Arrived quickly. Removeable fry funnel is nice. Only complaint I have is the suction cups could be better. They released from the tank glass spilling segregated fry into the main tank to be deviured by much larger African Cichlids. Very disappointing..

Works as it should

Very lame, small, cheap product. The suction cups have come off and its floated around the tank, the plastic cracked without ever being dropped or crushed. The V separater in the middle as well as the lid float, theres no clips or snaps to hold them in place, so I had to put a crunch of metal as a weight to keep the separater from floating and cannot submerge the tank or the lid floats away. The air bubbler is located at the top of the tank, so without being submerged that is useless too. The only thing that works is keeping my fish isolated, not even sure if the babies will fit through the V separater yet.. I didnt expect perfection, but I did expect it to work, considering it's only a few dollars cheaper than other brands.

great

It's a decent size for an internal breeder box. I didn't have the space for an external one. The plastic is much thicker than the last box I bought for the same price. The only piece even remotely broken was the air tube input, and it only had a tiny chip in the end of the piece that goes inside- so it's still 100% functioning and doesn't affect anything. The box can be split into two pieces, as in the top non slitted part and the bottom with the slits. The WW piece is easy to remove, and the lid is easy to take off (my last one was NOT). I do suggest leaving the lid above the waterline, however, as it has two holes. I used it for newborn myatery snails, and when I moved them, I put my black molly into it. She doesn't seem very stressed, honestly, and likes to nap in the V's. It also has very soft, silicone suction cups, meaning they dont pop off if you so much as walk past the tank wrong like the harder vinyl ones. All in all, a great purchase. Very glad I bought it.

Used this as a container for macroalgae in my reef tank. Works very well!

Perfect for nano fish & tank

the cage is only holding by the top so a space can be created at the bottom and twice i used it and some free fish got cut between the cage and the glass and died..

The breeder box itself is an excellent product (Medium) is a perfect size for 10 gallon. Shipping.. I’m surprised it wasn’t broken. In a bag with no wrapping, original box was open with parts out and bouncing around in the bag.

Great build quality and high transparency make it easy to observe what’s going on inside. Operation is straightforward—no complicated settings. A big plus is the dedicated port that lets you plug in an air pump for extra oxygenation whenever needed. Overall, a very solid and user-friendly product.