Congrats on the spawn. They should go free swimming about 5 days after hatching. You can keep them with the parents until they are ready to spawn again, you can keep them beyond that if you want depending on the parents but the first batch will eat most of the second. Once they go free swimming you could feed them BBS and/or first bites, I use frozen BBS and first bites and and feed three to four times a day. You'll also notice them grazing on the surface algea all over the tank. Make sure you cover the filter intakes with a sponge or piece of fine mesh, filter bag or nylon stocking. When your ready to distribute them you tell people they are a cross, no more so than what you get from Petsmart but still not pure. They should look nice, good luck the first spawn is always exciting have fun.