I was told to put Kitty Litter in my new speaker stands. Was he joking?

Put dried fish in your stands,are fish dampening ?

Gold dust can be used if you have some extra gold lying around. Make sure it's well sealed so it doesn't attract gold bugs.

Whether you use sand or kitty litter do not just pour it into the stand. Pour it into appropriately shaped thick plastic and seal it. Then you don't need to worry about leaks or moisture ingress.

The moisture absorption might be an issue.  I used lead weights (free from my local tire store) and added sand.

JUST AS IMPORTANT as the material is the level of fill.  I experimented with quarter, half and all the way filled.  Surprised at differences, settling on about 2/3.  Clearly, like everything else: try and experiment.

Renowned speaker designer Andrew Jones uses kitty litter in his stands at the audio shows. If it's good enough for him, it's good enough for me. I put lead shot in the bottom of mine, then filled them with kitty litter. Works great!