Can goldfish be in tanks

You would need to put goldfish eggs in a separate tank, and yes, you may have to take the goldfish eggs out of the main tank where all the goldfish are, because the adult goldfish will eat the eggs. However, you can just cover the goldfish eggs in a plastic see-through box while being inside of the main tank if you don't want to take it out, just in case you may harm it, and the fish won't be able to eat it.