6qt Shoebox Refill Kit – Compact, Clean, and Ready to Run 2 lb Sterile Grain + 3 lb Substrate — Sized for 6qt Shoebox Tubs Small Tub. Serious Performance. The 6qt Shoebox Refill Kit is built for compact grows that still deliver strong results. Clean, vacuum-sealed, and properly balanced for 6qt shoebox tubs — no guesswork required. What’s Included 2 lb Sterile Grain Bag – Choose Corn or Milo (4T Unicorn bag with filter) 3 lb Premium Substrate – Hydrated to field capacity FREE Self-Healing Injection Port Why Growers Choose This Kit Lab-Sterilized Grain – Sterilized 2.5 hours in SH Scientific autoclaves at 15–17 PSI Balanced Ratio – Dialed in specifically for 6qt shoebox tubs Clean Handling – Vacuum-sealed for freshness and reliability Streamlined Workflow – Ideal for fast, efficient grows How It Works Inoculate the sterile grain bag. Allow full colonization at 70–75°F. Mix colonized grain with the included substrate. Transfer to your 6qt shoebox tub and allow substrate colonization. Introduce fruiting conditions and monitor humidity. Storage Guidelines Store sealed between 45°F and 70°F Use as soon as possible for best results Do not freeze Explore Other Grain Options Corn Grain Bags – Durable kernels with strong structure. Drippy Corn – Nutrient-dense option for advanced growers. Millet Grain Bags – High inoculation points for rapid colonization. Need Assistance? Hit the chat button at the lower right for help with orders or product questions. Legal Disclaimer: For laboratory use only. We assume no responsibility for product misuse. Sales are final and concerns are addressed on a case-by-case basis.
