Why 121°C Doesn’t Guarantee Sterile Substrate

Many substrate producers assume that reaching 121°C guarantees successful sterilization. In reality, steam distribution, venting, condensation and heat transfer determine whether microorganisms are actually destroyed throughout the substrate.
Why your substrate recipe stops working after scaling up

Your substrate recipe worked perfectly in small batches. Then production expanded – and consistency disappeared. Learn why scaling up changes heat, oxygen, CO₂ and moisture dynamics, and why industrial production requires more than simply multiplying a successful recipe.