{"product_id":"greenpad-co2-generator","title":"CO2 Generator by The Green Pad — Humidity Activated CO2 Pads","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe Green Pad is CO2 enrichment without the hardware. Each pad is a layered sheet of natural carbons and acids that reacts with the moisture already in your grow space — hang it up, and once humidity passes about 35% it starts releasing CO2 on its own. No cylinder, no regulator, no solenoid, no gas line, and no burner adding heat and water vapour to a room you are already trying to control. Three sizes cover everything from a propagation dome to a full grow room: Junior for cuttings and seedlings, Original for small tents, and the Grand Daddy for larger sealed spaces. Made in the USA.\u003c\/p\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eNo Tank, No Regulator, No Install\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eThe cheapest way into CO2 by a long way. Nothing to plumb, nothing to refill, nothing to mount — you hang a sheet of card and you are enriching.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eHumidity Does The Work\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eActivates off the room's own moisture at around 35% RH and up. A propagation space or sealed tent is already there — mist the pad lightly if you want it moving faster.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eNo Heat, No Flame, No Fuel\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eA gas burner makes CO2 by combustion, and dumps heat and water vapour into the room as a by-product. A pad is a passive chemical reaction — it adds neither.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eInert Until You Use It\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eUnused pads sit dormant in the pack until they meet humidity, so a spare box in the cupboard is not a countdown. Buy for the season, use as you go.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eThree Sizes, Dome To Grow Room\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eJunior sits inside a humidity dome or clone tent. Original covers 200-400 cubic feet. Each Grand Daddy pad covers 800 cubic feet with the output of four-plus Originals.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eSpecifications\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e The Green Pad\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Passive humidity-activated CO2 pad\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eActivation:\u003c\/strong\u003e Ambient humidity from approx. 35% RH, or light misting\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eComposition:\u003c\/strong\u003e Layered natural carbons and acids\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eJunior pack:\u003c\/strong\u003e 10 pads\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eJunior use:\u003c\/strong\u003e Humidity domes, cloners and clone tents\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eJunior replacement:\u003c\/strong\u003e Every other day until rooted or the dome comes off\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOriginal pack:\u003c\/strong\u003e 5 pads with 2 hangers\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOriginal coverage:\u003c\/strong\u003e 1-2 pads per 200-400 cubic feet (approx. 5.7-11.3 cubic metres)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOriginal life:\u003c\/strong\u003e Approx. 2 weeks, peaking at the end of the first week\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eGrand Daddy pack:\u003c\/strong\u003e 2 pads with 1 hanger\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eGrand Daddy coverage:\u003c\/strong\u003e 800 cubic feet per pad (approx. 22.7 cubic metres)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eGrand Daddy output:\u003c\/strong\u003e Equivalent to 4+ Original pads\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eGrand Daddy life:\u003c\/strong\u003e Add a fresh pad every 10-12 days; leave older pads in up to 20 days\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Dormant until exposed to humidity — no expiry countdown\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in the USA\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDisposal:\u003c\/strong\u003e Single-use, disposable\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePower required:\u003c\/strong\u003e None\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eGrower's Tip\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 0;\"\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eSeal the space or do not bother. CO2 enrichment of any kind only works in a room that holds air. If your extraction is running continuously you are pulling the CO2 straight back out — run the pads while the tent is closed, or put your inline on a controller.\u003c\/li\u003e\n\u003cli\u003eThis is why pads and clone tents go so well together. A sealed propagation tent is already warm and humid, which is exactly the condition a pad needs to activate, and there is no fan fighting you.\u003c\/li\u003e\n\u003cli\u003eHang it above the canopy, not beside it. CO2 is heavier than air and settles downward, so the pad wants to be over the plants rather than on the floor next to them.\u003c\/li\u003e\n\u003cli\u003eA light mist gets a pad going faster if your room is drier than it likes. Do not soak it — you are triggering a reaction, not washing it.\u003c\/li\u003e\n\u003cli\u003eStagger your replacements rather than swapping everything at once. Original pads peak at the end of week one, so adding a fresh pad partway through keeps the output steadier than a hard changeover.\u003c\/li\u003e\n\u003cli\u003eCO2 displaces oxygen. In any sealed room you are enriching, air it out before you spend real time working in there — basic practice, and worth the habit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eWhich Pad Do I Need?\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eJunior — 10 pack.\u003c\/strong\u003e Built for humidity domes, cloners and clone tents. It sits inside the dome with your cuttings, no hanger needed, and you swap it for a fresh one every other day until the cuttings are rooted or the dome comes off. Ten pads covers a full propagation run.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eOriginal — 5 pack with 2 hangers.\u003c\/strong\u003e The grow tent pad. One to two pads handles 200-400 cubic feet, which covers most single-tent setups. Each pad runs about two weeks, peaking at the end of the first.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eGrand Daddy — 2 pack with 1 hanger.\u003c\/strong\u003e One pad covers 800 cubic feet with the output of four or more Originals. This is the grow room pad — use it where running four Original pads would be fiddly, and add a fresh one every 10-12 days.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWork out your cubic feet first.\u003c\/strong\u003e Multiply length by width by height in feet. If you think in metres, one cubic metre is about 35 cubic feet — so a 1.2 x 1.2 x 2m tent is roughly 2.9 cubic metres, or a little over 100 cubic feet, comfortably inside one Original pad's range.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e5\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eRunning both is normal.\u003c\/strong\u003e Plenty of growers keep Juniors for the propagation bench and Originals or Grand Daddies for the flowering space. They are the same chemistry in different doses.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eHow To Use\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003eWork out how many pads your space needs from the cubic feet, then take only those pads out of the pack. The rest stay sealed and dormant.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003eHang the pad above the canopy using the supplied hanger, or lay a Junior inside the humidity dome next to your cuttings.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003eIf the room sits below about 35% humidity, give the pad a light mist to start the reaction. In a humid propagation space you can skip this.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003eKeep the space closed while the pad is working. Continuous extraction pulls the CO2 out as fast as the pad makes it.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e5\u003c\/span\u003e\u003cspan\u003eAdd a fresh pad on schedule — every other day for Juniors, weekly for Originals, every 10-12 days for Grand Daddies — and bin the spent ones.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003ePairs Well With\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem;\"\u003e\n\u003ca href=\"\/products\/seahawk-clone-tent\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eseaHawk Clone Tent\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eA sealed 0.75 x 0.5 x 0.7m propagation tent. Warm, humid and closed — the ideal home for a Junior pad.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/clone-tent-propagation-kit\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eClone Tent Propagation Kit\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eTent, LED bar, heat mat, humidifier and a 10-pack of Juniors bundled together at a saving.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/humidity-control\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eHumidity Control\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe pads run on humidity. A humidifier and a decent hygrometer make the whole thing predictable.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/grow-room-environment-control\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eEnvironment Control\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eFan controllers and timers so your extraction cycles instead of running flat out and venting your CO2.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/co-generators\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eAll CO2 Generators\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe rest of the CO2 range if you have outgrown pads and want a regulated system.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/propagation-gear\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003ePropagation Gear\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eDomes, trays and plugs — the setup a Junior pad was designed to sit inside.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow does a pad actually make CO2?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eIt is a layered sheet of natural carbons and acids. Moisture from the air is the trigger — once ambient humidity reaches roughly 35%, the layers begin reacting and release carbon dioxide steadily as the pad works through itself. There is no power, no combustion and no moving parts involved. A light misting speeds the reaction up if your room is on the dry side.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo I need to seal my tent for this to work?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eEffectively, yes — and that applies to every form of CO2 enrichment, not just pads. If an extraction fan is running continuously it removes the enriched air about as fast as the pad can produce it. Run the pads with the space closed, or put your inline fan on a controller or timer so it cycles rather than runs flat out. This is exactly why pads suit sealed clone tents and propagation domes so well.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhich size do I need for my space?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eJunior is for humidity domes, cloners and clone tents — it sits inside with the cuttings. Original covers 200 to 400 cubic feet on one to two pads, which suits most single grow tents. Grand Daddy covers 800 cubic feet per pad with the output of four or more Originals, for grow rooms. Work out your volume in cubic feet first: length by width by height, or multiply cubic metres by about 35.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow long does a pad last?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eIt depends on the size. A Junior in a propagation dome is swapped every other day until the cuttings root. An Original runs about two weeks and peaks at the end of the first week, so the manufacturer's guidance is to add a fresh pad weekly. A Grand Daddy gets a fresh pad added every 10 to 12 days, with older pads left in place for up to 20 days.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo unused pads go off in storage?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The pads stay dormant until they are exposed to humidity, so an unopened pack is not on a countdown the way a mixed nutrient or a compressed gas cylinder is. Keep them sealed and dry and take out only the pads you are putting to work.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhere should I hang the pad?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eAbove the canopy. CO2 is heavier than air and drifts downward, so a pad hung over the plants puts the gas where it can settle through the leaves. Original packs include two hangers and Grand Daddy packs include one. Juniors do not need a hanger — they simply sit inside the dome or tent with the cuttings.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs it safe to be in the room?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003ePads are a passive, low-output source with no flame, no fuel and no pressurised gas, which makes them the mildest CO2 option available. That said, carbon dioxide displaces oxygen in any enclosed space, so treat an enriched sealed room the way you would treat any of them: open it up and let it air before you spend an extended stretch working in there.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/details\u003e\n\n\u003cdiv style=\"margin: 2rem 0 0;\"\u003e\n\u003cp style=\"font-size: 0.95rem; font-weight: 700; margin-bottom: 0.75rem; color: #1a1a1a;\"\u003eSelect Pack Size\u003c\/p\u003e\n\u003cdiv style=\"display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.5rem;\"\u003e\n\u003cbutton data-variant-id=\"50235890794794\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #2e5e2e; color: #fff; font-size: 0.95rem; font-weight: 700; cursor: pointer;\"\u003eJunior — 10 Pack\u003c\/button\u003e\n\u003cbutton data-variant-id=\"50235890827562\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #fff; color: #2e5e2e; font-size: 0.95rem; font-weight: 600; cursor: pointer;\"\u003eOriginal — 5 Pack\u003c\/button\u003e\n\u003cbutton data-variant-id=\"50235890860330\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #fff; color: #2e5e2e; font-size: 0.95rem; font-weight: 600; cursor: pointer;\"\u003eGrand Daddy — 2 Pack\u003c\/button\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 0;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eCO2 Without The Cylinder\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003ePick the pack that matches your space and hang it up. Free shipping over $499*.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/grow-room-environment-control\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eBrowse Environment Control\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n\n  var selectedVariantId = '50235890794794';\n\n  var sizeBtns = document.querySelectorAll('button[data-variant-id]');\n  sizeBtns.forEach(function(b) {\n    b.addEventListener('click', function() {\n      selectedVariantId = this.getAttribute('data-variant-id');\n      sizeBtns.forEach(function(ob) {\n        ob.style.background = '#fff';\n        ob.style.color = '#2e5e2e';\n        ob.style.fontWeight = '600';\n      });\n      this.style.background = '#2e5e2e';\n      this.style.color = '#fff';\n      this.style.fontWeight = '700';\n    });\n  });\n\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt(selectedVariantId, 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e","brand":"The Green Pad","offers":[{"title":"Junior - 10 Pack","offer_id":50235890794794,"sku":"GPJR","price":27.95,"currency_code":"AUD","in_stock":true},{"title":"Original - 5 Pack","offer_id":50235890827562,"sku":"GPORIG","price":54.95,"currency_code":"AUD","in_stock":true},{"title":"Grand Daddy - 2 Pack","offer_id":50235890860330,"sku":"GPGD","price":49.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/CO2-Generator-by-The-Green-Pad.png?v=1748850599","url":"https:\/\/www.thegrowguys.com.au\/products\/greenpad-co2-generator","provider":"The Grow Guys","version":"1.0","type":"link"}