Red1966
Well-Known Member
I had forgotten about the toxic grow tents!As explained Stagnant air is air that's just that stagnant. It is too high in one make up or another the co2 can be too high the O2 can be too low. The heat from the lights can react to the tent lining rooms paint, sealants, tape adhesive nutrient fumes a ton of things. As mention it is similar to after winter you cant wait to open windows and screen doors the air exchanged in general makes you feel better and happier which is the same low level life of a plant does the same.......Joe the big article you post pretty much backed what i was saying..It mention you can pay little attention and get some benefits but it does express the use of precise environmental control. When you vent your co2 levels only drop for a few minutes before the co2 kicks back in and brings the designated co2 set point back online ie the prime ppm level is the 1200 to 1500 ppm level...Some said they are running 2200 ppm which is way to high. It is wasteful and if not ever vented can become toxic to plants and humans as you smoother the plant. Its similar to in a non sealed room where you need to exchange the air also. fresh air and air movement make huge differences. With correct co2 usage you should see up to an 80% total yield increase and a week or more shaved off flower times... I have seen some add co2 in the veg state but I have never seen it really add much to the difference from just added during flowering time... I have seen some rooms run co2 in negative pressure grow rooms and not vent but that's a different monster.. Commercial greenhouses do run co2 and they almost all vent in and hot as that's also for temp control or they have had a/c units in them which does the same thing as an ac will suck the warm air from the room exhaust it out which outside air is sucked in over the condenser coil and cooled before being forced back into the room but in grow situations dampers will close off the vents when not running again sealing the area....If you have the time try setting 2 identical grows up. Keep one with co2 and zero air exchange and in the other set your co2 up and dampers with in an outtake fans so air gets replaced a few times even if just 2 times right right before lights on and right as lights go off. Compare the yields and the flower density it will be different. I first started playing with co2 about 15 years or so ago. I have worked in a commercial greenhouse which is where I learned most of the basics then over the years being friends with many indoor growers and medical grow op folks notes have been shared and lessons taught.. Some use tanks, some burn propane, some Natural gas, some use bacteria and yeast for small enrichment but the best and most attentive growers control the entire environment like hawks.. Again you can run just co2 no exchanges but your not going to run on all 8 cylinders just 5 of them meaning it can be much better. For me it was just learning when I wanted the exchanges then taking the time to watch time and cordinate the timers on fans, setting auto close/open damper and good ppm monitoring and control setup...To each grower their own I just am sharing my decades of use and teachings given to me so it's just out there for those who understand and use it I hope you enjoy it. Those who disagree that's also fine best of luck in your methods and I hope its all good and if your happy with it then your fine. P.S On the sulphur topic it is a common practice to use sulphur burners to prevent and control mold it does not change the taste or even the natural aroma of the product. the fumes kill mold spores and the heat help control moisture so not sure why the one user was trying to say something bad about that as that's a very very long used technique.
