How much lead and silica sand in speaker stands?

So why go to trouble of getting lead & sand, when pebbles or pea gravel will work just as well? Plus, it is much easier to deal with if a move is needed. 

" Like I said, what this world is coming to.....  "
Imagine that, someone else's view that is not yours. Deal with it.

Alright.. I've gotten a good laugh at this one, mostly at myself.. Following my OCD instincts, I went to Bass Pro this afternoon and bought 2 - 25 lbs. bags of #4 lead shot and to the hardware store and bought a bag of silica sand. I filled them up, alternating between 2 cups of shot to 1 cup of silica sand. The stands ate all of the shot and most of the sand I bought. Yes you need a fork lift to move them around! If I can find my scales, I'll weigh them. I might have gotten carried away, but I don't imagine they'll be ringing.
Love the way the LS-50 Meta's are bolted to these KEF stands. 

https://en.wikipedia.org/wiki/Lead_poisoning#:~:text=Exposure%20at%20work%20is%20a%20common%20cause%....

Uh oh! Bolted, you say? Sorry. While that might be fine for keeping them on the stand, its not the way to go for sound. What you want is to make the stand as inert and stable as you can, and then allow the speaker to float above it. Nobsound springs are the easiest most cost effective choice. https://www.amazon.com/Nobsound-Aluminum-Speakers-Isolation-Amplifiers/dp/B07K9ZYP84 These things are adjustable - remove springs for lighter speakers - and its crazy how good they are for the money. They are now under virtually every component in my system.

miller carbon..
Ok.. I have some Isoacoustic pucks laying around... will they work?
For the lead poisoning folks, I used a mask and washed my hands and took a shower after I was through.. can't imagine it posses a threat after being encapsulated in the steel post and sealed with tape.