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CO2 supplement adjustments needed.

dreambomber
dreambomberstarted grow question 3 years ago
I have compressed co2 in the tank, but I have no measurement tool except of bubble counter. Can anybody help me to count the amount of co2 I need to provide for my tent? It is 40x40x160 cm, 256 liters.
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Week 4
Setup. Sensors
Feeding. Other
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Shagrath
Shagrathanswered grow question 3 years ago
Hi! Best way to be sure is to buy CO2 meter and controller to automatically keep it in desired levels. If you don't want to spend more money you can use math to calculate approx levels. So the optimal PPM for CO2 in veg is something like 800PPM and in flowering it's 1500PPM and normal levels in atmosphere is ~300ppm. You need to add 1200PPM more to the atmosphere in flowering to achieve 1500PPM and here comes the "tricky part". How powerful is your extractor fan? You need to add 0.12% of total volume of the tent to acheve 1500PPM. So 256l*0.12%=0.31l of CO2 but your extractor fan changes the air constantly so if the air gets changed once in a minute you need to have atleast 0.3l/minute airflow for CO2 to achieve that constant 1500PPM levels. Might not be totally accurate calculations but atleast you should get the idea from this
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