considering that u have both male and female convicts together,they will surely breed within 3 weeks after being together and lay around 70-100 eggs each spawn which will hatch in like 4-5 days as i remember mine did and will be free swimming within next 4-5 days.U don't need to feed the fry brine shrimp,The parents will chew up pellets and spit towards them and after 2-3 weeks of parenting,it is suggested to remove the parents from fry as they will be ready for next spawn and will eat the previous spawn to make room space.Maybe thats all u need,but still if u have any more doubt,feel free to pm me