Coarse Pumice maybe familiar for it's dry skin shaving capabilities - but it's also a fantastic aggregate amendment for potting substrates! Pumice is a volcanic rock biproduct which has expanded in extremely high heat, then ground down into beautiful chunky rocks.
Perlite; fluffy glass pearls of volcanic rock! This amendment offers insane versatility, with it's extremely porous structure and low water retention in soil mixes. Compared to it's wicking abilities in semi-hydro systems - it's truly an amendment for all.