Glad all is well naphtali! Honestly I don't know much more about it, I've been using it this grow & haven't noticed anything different, but my clones are so small it's probably not a good test.
I think it's mostly used by hydro guys, but maybe Munki or someone else has better info for you.
Take care
I've been using Silica now for a while, and all I can say for sure is that I've always been happy with nice thick stems and branches - sturdy plants. I'm not saying my plants are all that, because there are so many better growers than me here, but I do see differences in stem girth and sturdiness compared to many other plants I come across despite the fact that I don't usually have a lot of air movement on them. It also doesn't add much to the PPM's and seems pretty user friendly. (I use the Dutch Master Silica in Hydro). I did one grow without Silica, and I didn't feel like they were as sturdy - they seemed a bit spindlier. Just my hack observations, nothing scientific!
Munki - I'm a huge fan of your plants and approach, man. You are one of those growers who grow plants that inspire me. I feel pretty humble when I stop by your thread!