Things You'll Need
- Goldfish eggs
- Soft, cold water plant
Instructions
Get a soft, cold water plant for the female to spawn under. This should be under a foot in depth. Good plant choices include java moss and hornwort.
Look for tiny, clean eggs. They will be circular in shape and will stick to anything and everything in the tank.
After a day, look for a tiny black dot inside the egg. If a black dot appears, the egg is fertile. If there is no black dot, the egg is infertile.
The adult fish will start eating their infertile and fertile eggs immediately. If you want to keep the eggs and see them hatch, remove them from the adult tank as soon as possible. Keep them in a tank with low aeration. The eggs will hatch in four to seven days.