Exhale CO2 Bag — Mycelial CO2 Release

Exhale CO2 Bag — Mycelial CO2 Release for Grow Rooms

A clever biological CO2 source — the Exhale bag contains a mycelial culture that releases CO2 continuously for around 6 months of use. No tanks, no burners, no electronics, no noise. Simply hang in your grow space and let the biology do the work. Plants growing under artificial light often lack sufficient CO2 for optimal photosynthesis; Exhale tops up ambient levels passively.

Why growers choose the Exhale CO2 Bag:

• Passive biological CO2 release — no equipment, no setup, just hang and use
• ~6 months useful release — covers a full flowering cycle plus next veg, typically
• No fire risk or electronic failure modes — simplest possible CO2 supplementation
• Low ongoing cost — one bag covers months of grow time
• Supports photosynthesis optimisation — indoor plants under artificial light need the CO2 top-up
• Silent operation — no burners, pumps, or fans
• Ideal for small-to-medium tents — right-sized for home grow setups

Who it's not for:

CO2 output isn't controllable — you get what the mycelium produces. For precise high-ppm CO2 supplementation (1,200-1,500 ppm targets), a bottled regulator or LPG burner with controller delivers measurable targets. Effective CO2 supplementation requires high-intensity lighting (600W+ per m²); standard lighting can't use the extra CO2 anyway. For commercial-scale rooms, multiple bags or dedicated CO2 sources are needed.

See it running in our Stone shop. Drop by Unit 24, Emerald Way, Stone Business Park (ST15 0SR) to see this fixture set up, or call us on 01785 556355 (Mon–Fri, 10am–5pm) to talk through whether it's the right choice for your tent size and grow style. In stock now with 24hr UK dispatch, or choose click & collect at checkout.