The eggs are bright orange when they are first laid. Then they start getting darker. The day they are going to hatch, you will see the eyes of the little fishies turn a coppery color. That night when the lights go out, they will most likely hatch. If you put a flashlight at the top of the water/ turn all your pumps off, they will be attracted to the light...then you can scoop them up in a tupperware dish (or something similar). Put them in a separate tank with a weak air bubbler and start feeding them freshly hatched brine shrimp. Do a 1/2 tank water change every few days with tank water from your display, and you should have decent luck raising some. The first few batches, you will lose more than you raise, but with a little practice, you can get some free baby clowns to sell/trade/etc.