High Times magazine named Growstone GS-1 foam glass stones as a Hot Product for November 2017. https://hightimes.com/grow/4-hot-pot-products-november-2017/
“The medium in which you choose to grow helps determine the outcome and output of your garden. The new GS-1 Hydroponic Substrate from GrowStone is an Earth-friendly and extremely porous aggregate that absorbs and stores water while allowing plenty of capacity for the oxygen necessary to your roots. The rocks are quick-draining and made from 100% recycled glass instead of non-renewable mined obsidian.”
