Mark 1 Large Mushroom Monotub Package

The Microppose Monotub Grow Kit is the gold standard for high-performance, no-fuss home mushroom cultivation. Designed by experienced growers for simplicity and results, this kit includes everything you need to get started—minus the substrate and spores. Built for high yields without the need for complex electronics or unnecessary add-ons, the Microppose system is all about clean design, ease of use, and reliability.

Each kit includes a 66-quart heavy-duty polypropylene monotub with a sleek, stackable design capable of supporting over 200 lbs. Whether you’re growing in a small space or running multiple tubs, the interlocking lids and pans make vertical storage safe and efficient. The included custom-fit drop-in liner clings to your substrate as it shrinks, virtually eliminating side pinning and simplifying post-harvest cleanup—just lift and discard.

Ventilation is expertly managed with six pre-drilled ports, each equipped with Microppose adhesive high-flow filters that promote optimal gas exchange while retaining essential humidity. For the colonization stage, precision-molded plugs are included to seal out contaminants and stabilize moisture levels, giving your mycelium the clean start it needs to thrive.

Securing the tub is easy with the included unbreakable Microppose clips, designed to provide a tight seal with a satisfying snap. Every component is built to last through repeated cycles—this is not a single-use setup, but a long-term cultivation system trusted by the mushroom community.

Whether you're a first-time grower or scaling up your hobby, the Microppose Monotub Grow Kit offers the ultimate combination of function, quality, and simplicity—all in one complete package.

Included in the Kit:

• 66-Quart Monotub
• Set of Heavy-Duty Clips
• Peel-and-Stick High-Flow Filters
• Colonization Hole Plugs
• Custom-Fit Drop-In Liner

The Microppose Large Monotub is optimized for both novice growers and experienced cultivators seeking a low-maintenance setup. After colonizing your grain spawn (e.g., rye berries, millet, or brown rice), mix it thoroughly with a pasteurized bulk substrate and layer it evenly across the base of the monotub to a depth of about 3–4 inches. If using a casing layer (especially for species like Psilocybe cubensis or Pan. cyanescens), apply it evenly on top of the substrate.

Place the lid on and tape over or plug the ventilation holes during the initial colonization phase to retain CO₂ and humidity. Once full colonization occurs (usually 10–14 days), remove the tape or hole plugs to allow filtered fresh air exchange through the gasketed ports. Mist the sidewalls of the tub lightly with distilled water once or twice daily to maintain ambient humidity of 85–95%—avoid direct misting of the mycelium.

The monotub should be placed in a well-lit room with indirect natural light or a 6500K full-spectrum LED source for 12 hours daily. Maintain room temperature between 70–75°F (21–24°C). Within 5–10 days of initiating fruiting conditions, you should see pin formation, followed by maturing fruiting bodies ready for harvest within a week.

For species with higher fresh air exchange needs, you may briefly "fan" the tub by lifting the lid for 30–60 seconds once or twice a day, though this is typically not necessary due to the passive filter design.

Proper cleaning and maintenance are essential for preventing contamination and prolonging the usability of your Microppose Large Monotub. After each grow cycle:

1. Remove all spent substrate and dispose of it responsibly—do not compost indoors.
2. Rinse the tub thoroughly with warm water to remove debris.
3. Clean all surfaces, inside and out, using a soft cloth or sponge with mild unscented dish soap or a 3% hydrogen peroxide solution. Avoid harsh chemicals like bleach unless absolutely necessary, as they may degrade the plastic over time.
4. Rinse again and wipe dry with a clean, lint-free towel or allow to air dry.

Inspect filter gaskets or discs for discoloration, tearing, or microbial buildup. Replace any worn filters before starting your next cycle. If your tub comes with replaceable grommets or plugs, sanitize them separately and ensure a tight seal when reinserting.

Lids and tub walls can be sprayed with isopropyl alcohol (70%) before reuse for added contamination control. Store the monotub in a cool, dry location, away from direct sunlight to prevent warping or UV damage to the plastic. Keeping the monotub sealed during storage also prevents dust buildup or unintentional contamination.