If youse are lookin at silica, check out some of the mono silicic acid products out there. Most plant available form of silica. I use Silicium from New Millennium and love that stuff. Stems are heavy duty and no saggin or floppin at the end once buds get big. Also will buy a little time if you're lazy like me and plants dry back more than they should. Plenty of other mono silicic products out there. I was given a sample and have just stuck with it