In our never-ending quest to use cleaning products that leave no trace in the environment, and are truly nontoxic and safe for humans and pets, we have relied on pumice stone. Pumice stone works great on toilets, and on any hardened grime on any porcelain, and it keeps the human who use it strong, since it requires real arm power. In a mechanized world where working out becomes one more chore, a chore that requires real work can be a blessing! Pumice IS a mined product, but it is harvested from the surface of the earth, with relatively low impact and it is very plentiful. We consider it a super-green choice. To learn more about the substances we use to clean please visit https://www.safihomeworks.com/why-green-cleaning/