EZ CO2 XL Delay Activated CO2 Producing Mushroom Bag
- 7.5 lb mycelial mass provides continuous CO2 output for 6 months
- 24-hour delivery cycle works across both light and dark periods
- Zero-power design requires no electrical connections or heat-generating fuel
- View More Details
Earn 38 points for shopping and get $0.38 off your next order. Join Harvest Club for free.
More in this Series
Commercial & Bulk Purchasing
We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.
Who This Is For
- You are adding passive enrichment to your tent because your current atmospheric levels drop too low to drive vigorous growth
- You are moving to this mycelial bag because burner-based CO2 sources create too much ambient heat in your small footprint
What We Found
- The 7.5 lb weight of this bag is significant because it provides a much higher volume of substrate than standard sizes
- We recommend placing the bag near an intake fan to distribute the gas across your plant material without any ducting
What Users Say
- Users who swapped out their burner systems say they no longer deal with the heat spikes that used to stress their plants
- Growers who switch to these bags report better consistency during dark cycles because the CO2 release never stops
EZ CO2 XL Delay Activated CO2 Producing Mushroom Bag
The EZ CO2 XL brings the same passive, equipment-free CO2 enrichment as the EZ CO2 Delay Activated CO2 Producing Mushroom Bag — scaled up for growers who need more output across a larger canopy footprint. Inside the XL bag is a living, non-fruiting mycelial mass sustained by enough organic matter to produce CO2 continuously for approximately six months. The fungus establishes a symbiotic relationship with your plants, consuming the oxygen they release and returning CO2 through the bag's breather patch around the clock — 24 hours a day, through every light and dark cycle, without any input required.
The XL format — at 7.5 lbs compared to the standard bag's 4.4 lbs — contains more substrate to sustain higher CO2 output over the same six-month lifespan, making it a better fit for larger grow tents and enclosed spaces where the standard bag's output isn't sufficient to meaningfully raise ambient CO2 levels. No assembly, no connections, no heat, no odor. The bag is already actively releasing CO2 when it arrives — place it in your grow space and enrichment begins immediately.
Product Video
Features
XL Living Mycelial CO2 Source
A larger non-fruiting mycelial mass sustained by more organic substrate produces elevated CO2 output compared to the standard bag — better suited for bigger grow spaces.
Symbiotic Plant Relationship
The fungus consumes the oxygen your plants release and returns CO2 in exchange — a self-sustaining cycle that enriches your grow space naturally without any external fuel or power.
24-Hour CO2 Release
CO2 is released continuously through the bag's breather patch day and night — providing enrichment through both light and dark cycles unlike burner-based systems that shut off with lights.
~6 Months of CO2
The XL bag contains enough organic matter to sustain the mycelial mass and produce CO2 for approximately six months — covering a full growing cycle at elevated output.
Zero Setup Required
The bag is already actively releasing CO2 at purchase. No assembly or controllers are required, making it a simpler continuous solution than EZ CO2 Pads — place it in your grow space and enrichment begins immediately.
Odor-Free & No Heat
Produces no detectable odor and generates no heat — safe to use in enclosed grow tents and larger spaces without affecting ambient temperature or air quality.
Specifications
| Specification | Value |
|---|---|
| CO2 Source | Non-fruiting mycelial mass (fungus) |
| Active Duration | ~6 months |
| CO2 Release Schedule | 24 hours/day via breather patch |
| Heat Output | None |
| Odor | Odor-free |
| Setup Required | None — active upon purchase |
| Unit Dimensions (L × W × H) | 8" × 11" × 6" |
| Unit Weight | 7.5 lbs |
Frequently Asked Questions
The XL bag contains significantly more substrate — 7.5 lbs compared to the standard bag's 4.4 lbs — which sustains a larger mycelial mass capable of higher CO2 output over the same approximate six-month lifespan. Both bags use the same non-fruiting fungal culture, operate without setup, and release CO2 24 hours a day. Choose the XL for larger grow tents and enclosed spaces where the standard bag's output isn't sufficient to meaningfully elevate ambient CO2 levels.
The bag contains a living, non-fruiting mycelial mass — a fungal culture — sustained by organic matter sealed inside. As the fungus metabolizes the organic material, it produces CO2 as a natural byproduct, which escapes through a breather patch on the bag. The fungus also consumes the oxygen your plants release, creating a continuous self-sustaining exchange between the bag and your grow environment.
No. The mycelial strain used is non-fruiting, meaning it will not produce visible mushroom caps under normal grow room conditions. The bag is also odor-free throughout its operational life, making it appropriate for use in enclosed tents and indoor spaces where odor control is a priority.
Position the bag at or slightly above canopy height near the center of your grow space, with the breather patch unobstructed and facing outward. Since CO2 is heavier than air, placing the bag higher allows released CO2 to settle naturally down through the canopy. Avoid pressing the breather patch against walls or surfaces that restrict airflow — unobstructed passive release is essential to the bag's effectiveness.
Each XL bag sustains active CO2 production for approximately six months as the fungus gradually consumes the internal organic substrate. As the bag nears depletion, it will become noticeably lighter and less firm — the substrate volume decreases as it's metabolized. When output has dropped off noticeably, replace it with a fresh bag to continue enrichment through the next cycle.
The EZ CO2 XL is a passive enrichment solution best suited for enclosed grow tents and smaller rooms where ambient CO2 supplementation is the goal. For large grow rooms of 600 square feet or more where precise, measurable CO2 concentration targets are required, a dedicated burner system like the LTL Controls CO2 Generators delivers far greater and more controllable output. The XL bag's advantages are simplicity, zero operating cost beyond the bag itself, and continuous 24-hour release without controllers or fuel management.
Questions About This Product?
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
Why Trimleaf
Equipping home growers, craft producers, and commercial operations across North America since 2016.