Sorry my typing was bad, You can't see the eggs because they are inside the polyp. Then they hatch and spread comming out of the polyp itself. By this time it's to late and you are infected. If you have a serious infestation you will have to dip multiaple times over a week or two. I have only seen one spider in all of the colonies I have. I re-dipped all colonies and have not seen another since, this was many months back......