Complete Refill Kit for Large 66Q Monotub - Includes Grain Spawn & Bul – Midwest Grow Kits

Free shipping on orders over $99

Phone Support (M-F) 11am to 5pm CST

Our NEW Website is LIVE! Click Here to Learn More!

Complete Refill Kit for Large 66Q Monotub - Includes Grain Spawn & Bulk Substrate

(5)
$5999
Taxes, discounts and shipping calculated at checkout.
Refill your 66-quart monotub with this all-in-one kit. Includes grain spawn, 10 lbs bulk substrate, liner, and filter disks. Just add spores and grow again!


Description

Complete Refill Kit for Large 66Q Monotub – Grain Spawn + Bulk Substrate

Keep Your Monotub Going Strong – No Need to Start from Scratch!

Reignite your growing cycle with the Complete Refill Kit for your Large 66-Quart Monotub—a cost-effective, all-in-one solution to keep your setup producing flush after flush. Whether you're on your second harvest or your seventh, this kit delivers the essential components needed to revitalize your monotub without having to buy a brand-new system.

Just add your favorite spore syringe or liquid culture—and you're back in business.


What’s Included:

  •     (2) 5-Grain Spawn Bags – Packed with premium sterilized grain for vigorous colonization
  •     (2) 5 lb Bags of Select Bulk Substrate (10 lbs total) – Fully hydrated, pasteurized, and nutrient-rich
  •     (6) Filter Disks – Maintain ideal airflow and reduce contamination risk
  •     Custom-Fit Black Monotub Liner – Retains moisture, supports even colonization, and makes cleanup easier

Why Choose the Refill Kit?

  •     Saves Money – Bundle pricing beats buying each item separately
  •     Convenient – Everything you need, all in one box
  •     Reusable Monotub Friendly – Perfect for keeping your existing 66Q setup going
  •     Beginner-Friendly – Just inject, incubate, and fruit

Whether you're continuing a successful grow or bouncing back from a reset, this refill kit is the fastest and easiest way to keep your 66Q monotub thriving.

Limited Time Deal: Add a heat mat at checkout for only $15 and grow anywhere—no warm room required!

Customer Reviews

Based on 5 reviews
100%
(5)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
N
Nobodystill
Quick and clean

I ordered this it arrived quickly and everything in the box was clean and undamaged. I let it sit a week and no contamination.

Y
Yosuke
Everything you need!

So convenient to order - all refill supplies for monotub grow in one click

Y
Yosuke
Everything you need!

So convenient to order - all refill supplies for monotub grow in one click

L
Linda
Refill Kit

Received my order in a very timely manner- always had excellent customer service and quality products!

M
Michael West
Awesome product

Super simple, great yield,