Do goldfish lay eggs with a cottony type material?
Well, you can try, but what I recommend is a marble flooring. Before the ‘event’, you may want to condition them by giving them newly hatched brine shrimp for a week. When the eggs drop, the holes in between the marbles would allow the eggs to settle there to prevent the goldfish from eating the eggs.(Yes, but don’t look shocked, goldfishes REALLY eat their own poor defenceless eggs, but this is only Nature trying to eliminate the weaker ones. Remember, only the fittest survive.) After that, you can remove the parents and tend to the eggs. For the first few days, feed it with egg yolk with a dropper and change the water daily. After a week, try newly hatched brine shrimp until it can eat normal fish food.