Fluval Hang-On Breeding Box, Medium, 1.1 Litre

Excellent, worked well but you need a separate air pump to work, as it circulates water into the small tank sitting outside of the main tank and then back into the main tank.

Super easy to assemble and get started up. Very sturdy, instructions were clear and all in all a great purchase. A lot deeper than I expected too!The air flow alone may be a bit gentle for some so you can add a small filter to allow for more flow but all in all, great purchase!I did add a sponge instead of the provided little grates for added security when fry are beginning to be self sufficient.

it works well. I've used it several times now with platys. Thin layer of dark gravel, a bit of guppy grass / java moss, and a pregnant female can go into the breeder with as much as a couple of weeks to go and stay there without getting stressed. It's big enough that fry can get away into hiding. I found that even with the weir / grid thing at the outflow, quite a lot of fry got washed into the main tank, which didn't actually cause a problem given it was a shrimp tank, but obviously would depending on the tank's inhabitants. I guess a piece of foam might keep the fry from washing over if that was a concern.The downside is the airlift, which is noisy / gulpy and not the most efficient. I keep meaning to find a small water pump to move the water rather than the airlift, but haven't got round to it. There's a bunch of youtube vids with hacks some of them to quieten the llow. That said, it does work, it's quick and easy to set up, equally to take down and clean. I wouldn't consider anything but the large one.

Really love the design and the fact that fishes in the tank don’t really notice tiny fry any more. In tank breeding boxes get lots of attention from some persistent fishes who try to get a treat. This one doesn’t. I love oxygenated water circulation in the box and that water is taken and exchanged with the main tank. Not too big, size just right for a short isolation of a small fish.

The flow through this is minimal,Because it relies on an airpump you don't get a constant flow but rather bubbles that trickle in and make a very annoying sound much like a saucepan bubbling over with the lid on!It would be ok for fry but I wouldn't put my tiny platy in there to give birth its too small.

Attached a tiny water pump running on 3 volts to the end of the air-bubbler tube, so pumping water directly from the tank into it. This is virtually silent, as opposed to air pumps which can be quite noisy. Has been working well for a few months as our baby Platys get big enough to put back in the main tank.Ironically, since I set this up, our tank inhabitants have developed a taste for Platy fry, so I hardly ever see them before theyre eaten!Incidentally, Im not sure Id want to put a pregnant adult the size of a Platy in this for too long - its quite small if you include the separator plastics.

Excelent

Excellent