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Mushroom growing kit: 2 bulk substrate & casing mix bags, 2 grain spawn bags, and 6 white filter patches.
Mushroom cultivation: spore injection, mycelial growth, substrate mixing, fruiting, and harvest of golden mushrooms.
Mushroom growing kit: 2 bulk substrate & casing mix bags, 2 grain spawn bags, and 6 white filter patches.
Mushroom cultivation: spore injection, mycelial growth, substrate mixing, fruiting, and harvest of golden mushrooms.
Extra 10% Off

Midwest Grow Kits Complete Large 66Q Monotub Refill Kit

Price:
$79.99 USD
Or
Pay as little as
$7999/mo
for a term that suits you, up to 36 months. Learn More
⚡ BLACK FRIDAY OFFER! 10% off this item Ends: December 8th
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MODEL: RFL66
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Midwest Grow Kits Complete Large 66Q Monotub Refill Kit

Ready to start your next cultivation cycle without purchasing an entire new setup?

The Midwest Grow Kits Complete Large 66Q Monotub Refill Kit provides all essential components to revitalize your existing monotub setup with maximum efficiency and cost savings.

Perfect for experienced growers looking to maintain continuous cultivation cycles without the expense of purchasing a complete new system.

This comprehensive refill package includes two premium 5-grain spawn bags ready for inoculation with your preferred spore syringe or liquid culture. Once colonized, simply mix with the included 10 pounds of pre-pasteurized Select Bulk Substrate - specially formulated to encourage vigorous mycelium growth and abundant fruiting.

The kit also features six replacement monotub filter disks that maintain optimal airflow and humidity levels while providing protection against airborne contaminants. The custom-fit black monotub liner helps retain proper moisture levels, promotes even colonization across your substrate, and significantly simplifies the cleanup process after harvesting.

By choosing this comprehensive refill kit instead of purchasing individual components separately, you'll enjoy substantial cost savings while keeping all your essential supplies conveniently bundled in one package.

Product Highlights

  • Complete refill solution for large 66Q monotubs with all critical components included
  • Dual 5-grain spawn bag system for accelerated colonization and increased yields
  • 10 pounds of nutrient-rich, pre-pasteurized bulk substrate for optimal growing conditions
  • Six replacement filter disks to maintain ideal growing environment
  • Custom-fit black monotub liner for moisture retention and simplified cleanup

Midwest Grow Kits Complete Large 66Q Monotub Refill Kit Features


Dual 5-grain spawn bags for robust mycelium development and higher yields 
Dual Spawn System

Two sterilized 5-grain spawn bags provide double the colonization potential for faster development and significantly increased yields.


10 pounds of specialized bulk substrate in two 5-pound bags 
Premium Bulk Substrate

10 pounds of pre-mixed, pasteurized substrate in two convenient 5-pound bags, formulated specifically for vigorous growth.


Six monotub filter disks for optimal air exchange and contamination prevention 
Replacement Filter Disks

Six fresh filter disks maintain perfect gas exchange while providing essential protection against airborne contaminants.


 Custom-fit black monotub liner for moisture retention and easier harvesting
Custom-Fit Liner

Precision-cut black liner prevents side-pinning, maintains ideal moisture levels, and makes post-harvest cleanup significantly easier.

Midwest Grow Kits Complete Large 66Q Monotub Refill Kit What's In The Box

  • 2 5-Grain Spawn Bags
  • 10 Pounds of Select Bulk Substrate (two 5lb bags, pre-mixed and pasteurized)
  • 6 Monotub Filter Disks
  • Custom-Fit Black Monotub Liner

Section 4: Usage Information

Midwest Grow Kits Complete Large 66Q Monotub Refill Kit Usage Information

This refill kit is designed for growers who already have a large 66Q monotub setup and need to refresh their growing supplies. The process is straightforward:

1. Clean and sanitize your existing monotub thoroughly before starting a new cultivation cycle

2. Inject 5cc of your preferred spore syringe or liquid culture into each of the provided 5-grain spawn bags

3. Allow the spawn bags to fully colonize with mycelium (typically 2-3 weeks in optimal conditions)

4. Break up the colonized spawn and mix thoroughly with the Select Bulk substrate in your monotub

5. Install the fresh filter disks and liner in your monotub to create optimal growing conditions

6. Maintain proper temperature, humidity, and light conditions according to your specific cultivation requirements

By using this complete refill kit, you'll save time and money compared to purchasing individual components separately, while ensuring all materials are perfectly compatible with your large 66Q monotub system.

Midwest Grow Kits Complete Large 66Q Monotub Refill Kit Specifications

Specification Value
Compatible With Large 66Q Monotub
Spawn Bags 2 5-grain, pre-sterilized
Substrate Weight 10 pounds (two 5lb bags)
Substrate Type Pre-mixed, pasteurized Select Bulk
Filter Disks Included 6
Liner Type Custom-fit black monotub liner
Recommended Culture Amount 5cc per spawn bag (not included)

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

  • Most orders are processed within 24-48 hours after being placed.
  • Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

  • USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
  • FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
  • UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

  • These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
  • For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

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