Exhale Homegrown CO2 365 - Self-Activated Bag for Grow Rooms & Tents - Great for Indoor Grow Rooms - 4 lbs

If you’re serious about indoor growing, CO₂ support like this isn’t optional—it becomes part of your foundation. The Exhale CO₂ bag is one of the cleanest, simplest upgrades I’ve added to my grow environment. Especially in indoor setups where managing CO₂ can get complicated fast, this gives you a reliable, no-stress solution that just works. For newer growers especially, it removes a lot of the guesswork without compromising results. What stood out to me most is how clearly my plants responded. There’s a noticeable directional growth and overall vigor that started showing once it was introduced into the space. It’s the kind of subtle but undeniable shift you only really understand once you see it for yourself. Even more importantly, it’s completely hands-off. You set it up, let it do its thing, and it continues working in the background without needing constant attention or adjustments. That kind of consistency is invaluable in any serious grow setup. This has earned a permanent place in my indoor system. It’s simple, effective, and dependable—everything you want from a foundational product. Thank you, Exhale, for helping me raise a champion 🏆

Great stuff, it took about three weeks to reach its max. Im using it in a 3×3 and my CO2 is ready well over 1700. My plants are eating it up and getting huge. I will be ordering more

see a big difference A+ product

It's been 10 days since installation. No increase in CO2 at all. Update So after 1 month it brings co2 up 200. So it does work

Arrived as it should have, not inoculated because that's the one I purchased. Very easy to hang, and seems pretty solid. A lot of these negative reviews are from people that do not understand what they ordered. Unless you specifically order the one that says "self activated", then you will receive one that has already been activated. For the ones claiming they received a bad one because it has white "mold" growing inside, uh that's the stuff that actually produces the co2. It's called mycelium. This is an excellent way of adding some co2. It's effective if used correctly. If not used correctly, or if your environment or plant health is trash to begin with, then this will not work for you at no fault of the product. I have reordered another one, and will continue to order these, as they are a way cheaper and much safer way to obtain a co2 boost for your plants environment.

Mfg site says product is perfect for a 4x4x8 grow tent. Grow tents use high intensity lights that produce lots of heat; if you vent the heat in tent you also vent the additional CO2, negating the positive benefits of the increase in CO2. I purchased a CO2 meter to test, placed the bag plus meter in a small sealed area and it increased the ppm by more than 400 PPM. Placed CO2 in tent with an exhaust fan and meter and there was almost no additional increase in CO2 ppm. I ended up purchasing an additional grow light and got much better results.

I don’t know the specs on the actual CO2 added but my plants look good. It took around 3-4 weeks to fully activate but that was expected. It worked exactly as it should.

Bag leaked and had mushrooms growing on the outside,

Produkt Ablaufdatum endet im Dezember 22 somit keine 6 Monate

The bag dried up and stopped working after a few weeks waste of money and they always send out activated bags

Bonjour sur les deux exhale bag il n’y en a qu’un sur les deux qui c’est activé, il n’ai pas devenue blanc comme l’autre depuis que je l’ai acheter il n’a pas changé de couleur et il ne dégage presque pas de CO2 contrairement à l’autre qui produit la quantité normale de co2 vue le prix je suis dégoûtée la prochaine fois je les achèterai sur un autre site car sa fait environ 60 euros j’étais par la fenêtre. Bref je suis dégoûté .

Took around a month to fully activate, its pumping along now. Impressed.

Would definitely recommend these mine’s only been in there for less than a month and it’s incredible. The difference it made I’ve done three small girls without these and wow can you see the difference?