When I first started rebuilding my PT heads I used silica and had ordered from a few different places. Shortly after, I discovered cotton and have been very happy with it. Recently I decided to build some micro coils for my sister using the silica. I built a few using the 3 different sourced silica and found that they all vaped/tasted different. One was so muted that I could hardly taste anything. One tasted almost as good as my cotton. My problem is, I can't remember where I got them all from. So, for all you silica users, what do you prefer and where do you get it? I'm looking for regular silica cord and not the ecowool as I use a bead needle to thread strands of it into the coil.