Loading speaker stands with?

@shooter41 Cool. For others without platforms, spikes work as advertised only on a rigid, massive floor (concrete slab) where energy actually drains into an inert sink. On suspended wood floors, spikes couple a speaker to a resonant structure — potentially worse than nothing. Decoupling (compliant isolators) works regardless of floor type, which makes it a more reliable default.

As for filling the stands, it depends on where the isolation is. If the platform is under the stand, fill still matters — it damps column resonances that transmit directly into the cabinet via the top plate. 

@thecarpathian 

My apologies I read your post wrong and thought you were confused about how much a quarter mm is. 

I used a combo of bbs with fine sand for my AN-E stands.

+1 for Sound Anchor. 

Recently set up some Omega speakers on SA stands. I used Stack Audio component idolaters under the stands. Big improvement heard by all 3 of us.

Steel shot used for abrasive blasting media uses the SAE J444 grading system where the number in the designation represents the nominal diameter of the shot in ten-thousandths of an inch.  So S-110 represents 0.0110 inches, which is 0.279 mm, or just a bit over a quarter of a mm.

FWIW, Sound Anchors uses sand to partially fill their stands. I have owned a bunch of them and they have always worked great for me.