he GRAND DADDY PAD CO2 generators has made adding Carbon Dioxide to indoor gardens easier than ever. THE GRAND DADDY PAD absorbs the humidity in your indoor garden, to power its natural chemical reaction, the newest in this line of GREEN PAD CO2 generators. THE GRAND DADDY PAD or GDP is the largest and strongest GREEN PAD. Each GDP has the power of 4 original GREEN PADS giving the growers a better value. "Phenominal product, they work awesome and I can barely keep them on my shelves." Jamie - Third Coast Garden Supply, MI EASY TO USE: To raise your PPM's follow the directions and hang 1 GRAND DADDY PAD above your canopy per every 800 cubic feet of garden space. Activated by humidity (35%) and /or by lightly misting with water or you can add a moist sponge to a folded GRAND DADDY PAD. Add new GDP's every 10-12 days, discard after 3+ weeks. Adding more of THE GRAND DADDY PADS will increase your PPM's in your specific area. FOR ALL YOUR CURRENT CUSTOMERS THAT USE TANKS.Do not get in a situation where you run out of CO2. The GRAND DADDY PAD is your backup for those growers using CO2 tanks that run empty. Keep an extra pack on hand for emergencies or when you cannot get a tank refill. Without expirations issues, The GRAND DADDY PADS are ready when your garden needs them.