Breeder boxes and breeder nets often cause considerable stress to pregnant fish. So much so ,that they sometimes abort the birth prematurely and few if any young survive. Is often better to purchase lots of artificial floating plants like Bamboo grass or live plants and allow the plants to float on the surface . Young fish will instictively rise to the surface and feed and hide among the plants. foods should in my view be algae based or vegetable based foods with occasional crushed freezedried brine shrimp and or other dried flake food that is finely crushed for the young fish to feed on. After approx four weeks,the little fishg will be large enough not to be viewed as food for adults.
If you feel you must remove babies, floating plants are still good idea, Take a large ,clean plastic cup and place it near the fry while they are at the surface among the plants and by lowering the cup into the water, fry will be collected as well. Usually works best at first light when fry will all be at the surface expecting food. Some babies will be lost ,but by using the plants,either real or artificial, plenty will survive without our intervention.
Have also found that java moss and or moss balls, are good for young fish who are largely herbivores and enjoy snacking on this as well as the tiny creatures(infusoria) found there.
These fishes have been having babies without our help for ions. I would try and provide said cover at surface and let fish do the rest. IMHO.