No flow hood? No problem. Here's how a simple plastic tub can give you laboratory-grade sterile conditions — and why it changes everything for beginner mushroom growers. Still air box setup for sterile mushroom inoculation This article is part of the Spores Lab Contamination & Sterile Technique pillar. For the complete overview of contamination biology and sterile technique principles, start at sporeslab.io/post/sterile-technique-preventing-contamination-in-mushroom-culti