Product to fill up speaker/audio stands and racks


Just wondering what might be the best most user friendly product to fill stands and racks with. Sand? If so, what type?
How about lead shot? or Aquarium rocks? I don't want a mess or a big expense. Thanks for your input. Dave
canucks0
I have also heard of some using Kitty Litter,,which was said to do just as well as sand....
Very Fine grade of steel shot, easily acquired at gun shops or steel blast, very resonant and mass heavy.
Another recommendation for lead shot. It has the most "dead" weight per volume, is easy to use and unless you spill some, no mess.