Yesterday I happened accross this at petsmart and thought I'd give it a try to save a higher percentaeg of the fry (I'm sure a lot get eaten in the main tank.) You can imagine it as being an air driven HOB filter. I'm really liking that it contains the fish on the outside of the tank so no fry can be eaten through the slits.
It came with 2 different screens (different sizes) to cover the overflow so no fishies escape back to the main tank. It also came with a gang valve to fine tune adjust the flow rate. I like that all you can see from the main tank is the intake tube. Yes I breed my fish, but I still want the tank to look good as it's in my living room.
And here's a top viex for S&Gs.
So has anybody used this product? I am excited about it but have only had bad experiences with breeder traps before. I'll let you know how it works for me. I guess my learning curve will be accurately determining when the female will drop her fry as I wouldn't want to keep her there for more than a couple days...