How to clean and disinfect glass marbles from fish tank?

My goldfish of a couple of years died recently and I m getting ready to clean out it s tank to put away for storage. I used glass half-sphere marbles for the bottom of the tank but as you may know, they get dirty easily. I would like to be able to keep the marbles but I don t know how to properly disinfect them.... show more My goldfish of a couple of years died recently and I m getting ready to clean out it s tank to put away for storage. I used glass half-sphere marbles for the bottom of the tank but as you may know, they get dirty easily. I would like to be able to keep the marbles but I don t know how to properly disinfect them. When I would clean the tank I would disinfect them with hot water but I don t know if that was the right way to go about it. Any suggestions? thanks
9 answers 9