13 lb Monotub Refill Kit – 5 lb Sterilized Grain & 8 lb Bulk Substrate
13 lb Monotub Refill Kit – 5 lb Sterilized Grain & 8 lb Bulk Substrate
Keep your grow cycle going with a complete monotub refill: 5 lbs of sterilized milo sorghum grain spawn and 8 lbs of pasteurized bulk substrate, ready to use straight out of the bag.
Made for growers who want to run the next batch without buying a whole new kit. Add your liquid culture (sold separately) and go.
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What's included
- 5 lbs sterilized milo sorghum grain spawn: double-washed and soaked overnight in RO water, enriched with gypsum, then vacuum-sealed.
- 8 lbs bulk substrate: coco coir, vermiculite, gypsum and Azomite, pasteurized and hydrated to field capacity.
Why growers refill with us
- No prep work: nothing to soak, mix or sterilize — inoculate, mix and maintain humidity.
- Plant-based substrate: longer shelf life and no odor.
- Fast colonization: hydrated to field capacity with the minerals mycelium needs for multiple flushes.
- Clean and sealed: lab-tested, heat-sealed with a 10 mm industrial seal in thick 3 mil bags.
- 0.5 micron filter patch: proper airflow without letting contaminants in.
- Fits most monotubs: a straight swap for your next run.
Why Spore Sorcery? Over 30 years of mycology experience, and every batch made fresh in a sterile commercial facility and lab-tested before it ships.
Note: This kit contains no mushrooms or mushroom culture. It is a sterilized growing medium for home mushroom cultivation.

