Many of the forum reviews about the ExHale CO2 bag have been negative.. many more positive! We have thoroughly tested this product to find that the bags do indeed produce a high level of CO2 locally to the bag, but users must be realistic about CO2 PPM levels that can be reached when using this product if in an enclosed space with ventilation equipment running full time in close proximity to the bag.


Photosynthesis is the process by which plant leaves make carbohydrates. Sunlight, CO2 and water are converted into carbohydrates and O2 by the action of chlorophyll in the chloroplasts of the plant. Plants growing indoors under artificial light often lack enough CO2 to efficiently photosynthesise. When plants are able to maximize the process of photosynthesis the result is an enhanced growth rate, increased output and larger yield potential.

There is so much talk about this new product that we thought it would be a good idea to submit a blog with our honest review of this new product!

We placed one ExHale CO2 bag in our in-store demonstration Wilma10 Hydroponic Grow Kit with DS120 Grow Tent and found within three days that there was a noticeable difference with leaf colour of the Chilli plants, this is a direct response from enhanced photosynthesis! We have also placed two of the ExHale CO2 bags in our in-store demonstration Secret Jardin Dark Room DR300W grow tent and we have seen such an increase in growth rate of our basil plants, that we are now cropping the plants every 1-2 weeks instead of every 2-3weeks!


For effective coverage; We recommend one ExHale CO2 bag per square metre, or for 4-6 medium plants. Although ExHale state that a bag should last six months, we have found that the drop off in CO2 output means that realisticly a bag should be replaced every three months to achieve maximum potential of the product.

Our conclusion is that generally these bags will increase growth and yield potential of your plants, and as an inexpensive alternative to more expensive, complex CO2 dosers…highly recommended by Somhydro! ~ Lee

We would still recommend considering a CO2 doser such as the Unis CO2 unit or the Evolution CO2 Controller if you are wanting to have complete control and usuage of CO2 in your grow room or grow tent.

How to Use ExHale:

ExHale comes complete and is cultivating CO2 even before you get out of the checkout line. No need to turn it on or turn it off, simply place ExHale in your grow space and leave it alone to do its job.

A continuous shower of CO2 directly onto your plants is the most efficient way to deliver CO2. Placing the ExHale Cultivator slightly above the level of your plants will insure they receive the CO2 they need 24 hours a day for up to 6 months.

ExHale cultivates CO2 24 hours a day with no need to refill bottles or use expensive CO2 production units. The power of ExHale lies in the mycelial mass inside the vented cultivator. This mycelial mass cultivates CO2 and the microporous breather patch releases CO2 continually for up to 6 months.

The ExHale Cultivator is designed for small to medium grow spaces , or more specifically 1 ExHale Cultivator will provide 4-6 plants with the CO2 they need. ExHale can be used for both vegetative plant growth as well as for fruit and flower production.