Why is the difference between the large and small holes on the monotub?

Both the large and small holes are for gas exchange. However, given the proximity of the small holes to the substrate, many growers will remove the micropore tape during fruiting to increase oxygen -- especially if the mushroom caps are too small and/or the stems are too thin and stringy. That said, if the mushrooms are growing just fine, many will just leave the micropore tape on (as it protects against contamination.)

Do I need to use micropore tape on the small holes, or can I just leave them open?

During colonization, you don't want the small holes open. Covering them with the black micropore tape keeps out contaminants and maintains a higher CO2 level.

How much coco coir should I use?

Only a thin layer of coco coir (approx. 1/2 inch) is necessary. Coco coir should only be added once monotub is fully colonized and pins begin to form.

We recommend cleaning your monotub between each use to keep all surfaces as sterile as possible.

• Wipe down all surfaces to remove dirt and spores with a soft cloth soaked in warm water. 
• Sanitize by spraying with a 70% isopropyl alcohol solution inside and out.
• DO NOT use bleach or abrasives.

North Spore's products shall be used only for lawful purposes. North Spore does not condone Psilocybin (Psilocybe cubensis) or hallucinogenic (magic) mushroom growing in jurisdictions where it is currently illegal.