Hi There,

20 Microns is still too large for absorbtion. There would be some break down over time but it's difficult to say just how much (dependent on PH, nutrient concentration ect). Checkout Prosilicate liquid although I don't know exactly the particulate size, it is much smaller than the sand you want to use. Good luck,

Herbus
Herbus Reviewed by Herbus on . silica sands as silicate nutrients? My workplace uses significant amounts of silica sand, ranging from very small particle sizes (20 microns) to significantly larger (100-200 micron) and as such I can get access to a decent amount of it for free. Does anyone know if this would provide silicon for hydro plants sufficiently? Rating: 5