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CO2 Generator Bags

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The FunGuy WA CO2 Generator Bags are a natural, cheaper and easier way to supply carbon dioxide to plants when growing in a hydroponic grow room or greenhouse.

No need to use expensive electric generators, regulators, solenoids & timers.

A-Grade Hydroponics has tested many CO2 solutions over the years, and finally found  a superior solution. Visit our Melbourne showroom to experience them firsthand.

How does it work? As the fungi inside the CO2 bag grows it will absorb the oxygen in your grow room in order to produce carbon dioxide (CO2). Being an opposite gas exchange to plants, they make a perfect companion. CO2 will be available to your plants through a gas exchange filter attached to the bag.

Instructions: Use one CO2 bag for every 1m² of growing area.

If you are not using any extraction, the best place to put The FunGuy WA CO2 bag is  above the plant canopy. CO2 is heavier than air under the same temperature/pressure and will be available for plants below. Creating air movement within your indoor grow space will help avoid CO2 being stagnated in the bottom of the room.

If you are using extraction place the bag underneath the plant canopy as long as airflow is good enough to help circulate the CO2 upwards and around the room.

If you have a ventilation system in your grow room, you'll want to place the the CO2 bag at the furthest point from the extraction point.

How long does it last? FunGuy WA's CO2 bags will last up to 6 months in ideal environmental conditions. For best results, and to get the most from every bag, introduce a fresh CO2 bag every 3-4 months to keep 1m² levels consistent. When the white mycelium has stopped growing and the contents have shrunk a little, it is time to remove the first bag from your grow room. (Enviro points: Add the contents of the depleted bag to your compost.)

Like all natural products, FunGuy WA's CO2 bags can vary in colour. They start off brown and turn white as the Mycelium colonises the substrate content. This is completely normal and totally safe.


*All orders are dispatched in unmarked boxes to maintain your privacy.*


Orders are shipped via Australia Post or Big Post. Orders are generally dispatched on Tuesday, Wednesday and Friday. Please allow for additional delivery time for remote areas. If you require express delivery, please contact our sales representatives at 03 9555 6667 or email to obtain a quote. 

Couriers will attempt delivery to the specified address. If no one is home to receive the delivery, the couriers will leave your parcel somewhere safe. If there is no safe place, re-delivery or collection will be organised.

We reserve the right to charge for any redeliveries if they occur. You are welcome to call us if special arrangements need to be made.  

Due to the increasing frequency of online fraud and theft, we are unable to ship to P.O. Boxes and Parcel Lockers.


All freight charges are calculated on weight, dimensions and location. We are committed to keeping shipping charges at a minimum and do not charge handling fees.

Please note: Freight costs are subject to change. Regional areas, large and bulky orders, and tail-lift delivery occasionally incur an additional levy. Should these costs need to be amended it will be to reflect the actual charges, and not incur additional ‘shipping and handling’ fees.

We will notify you if this rare situation occurs.



All payments must be cleared before dispatch. Payments can be made online via PayPal, AfterPay or Electronic Funds Transfer. Payments can also be accepted via credit card by phoning 03 9555 6667.

Please allow at least 24 hours for payments to clear.


You will be notified immediately if an item is permanently unavailable, with options for a replacement item at equal or higher value, refund or store credit.

All refunds will clear within 3-5 business days. Store Credits will be issued as an electronic Gift Card to be used online or in-store.


We comply with all necessary restrictions and guidelines when shipping any products classified under the Dangerous & Prohibited Goods & Packaging Post Guide.

If, for any reason in compliance with these guidelines, we are unable to fulfil an order a refund will be issued immediately.