Humidor humidity level.

Originally Posted by Katmancross

I tried the HCM beads...4 oz for a 150 count humidor. The humidity had dropped because I hadn't paid attention to the hygrometer for a week. My Boveda packets were hard as rocks.
Within a few hours, the beads got it up to 65% and it's stayed there ever since. And remember, the beads require no water and no other humidification was needed. A bloody miracle!

Where can one purchase HCM beads ?
And is there better/worse beads?