Surprise fry are always great! Congrats! A sponge cover on your filter intake & lots of plants really help survival rates. I have lemon tetras from a friend that are on their 3rd generation from his tank so I'm hopeful & 3 sewellia fry (from F1 hillstream loaches) that miraculously lived! Plants can supply hiding areas & foods for tiny fish, cichlids are smart & a few almost always survived.