Pick up a sweater washing bag from wall-mart for a dollar maybe two dollars. This is a cloth net bag with a zipper on top. Clean out what you can by hand and then put the rest of your grow rocks in the bag.

Place the bag in the dishwasher and drop a little florakleen or one of the other flushing products in the bottom of the dish washer. Turn it on and run it on pots & pan setting. This will not only clean your grow rocks but it will also sterilize them at well.

No point in buying more when you can clean & sterilize them that easy.
Zandor Reviewed by Zandor on . cleaning medium how do i clean the clay balls from a previous grow????:rastasmoke: Rating: 5