All the water used in the experiment came from the same source, the same vessel was used for boiling water both on the stove and in the microwave, and all three types of water were stored in identical containers.
Peeled hard boiled eggs can be stored in the refrigerator in a bowl of cold water to cover for about 1 week (change the water daily). SAFETY NOTE: It is not safe to leave hard boiled eggs (including those in their shells) out at room temperature for long (and especially in hot water).
Hard boiled eggs, peeled or unpeeled last about a week in the refrigerator. I would suggest wrapping the egg in clean film or put it in a plastic bag. If it smells funny, through it out. And if it turns a bit grey-ish around the yolk that's not dangerous. The discoloration is due to the formation of ferrous sulfide where the yolk and white meet Itâs formed when iron from the yolk reacts with hydrogen sulfide from the white. How Long Hard-Boiled Eggs Last in the Refrigerator.