Exhale C02 Bags PPM Tested! - YouTube

this video shows that these bags actually increase co2 from 300 ppm outside a 4x4 grow box to over 1200 ppm inside. not a bad increase. they may not be as effective as dry ice and other methods but they are probably alot more accessible for people to get and for a fraction of the price of expensive CO2 system they'll offer improved results. IMHO if they raise the PPM of CO2 of the ambient air they can only help.
Shallow Hal Reviewed by Shallow Hal on . 10 day old seedlings looking great but need watering advice I'm using an airlift pump to drip feed the seedlings . Could I leave the drip feeders running 24/7? At the moment I drip feed in the morning and afternoon for 1 hour at a time.. There looking great but will they stand for watering 24/7? Rating: 5