I avoid breeding traps but do have one for an emergency. I much prefer lots of cover and the female in a growout tank that she can come out of as soon as the fry are born. The other option with things like endlers and ameca splendens is to just set up a tank with lots of cover and realize that some will be lost. The endlers don't actively hunt fry so most will survive. The amecas are big enough at birth to survive in a typical livebearer environment.