attila76
Member
Hi all Icmag,
See... I got this friend who started a sealed container grow, and he wanted me to post this thread.
About the system: 8k, fully sealed 40' container, co2 supplemented w/ppm3 @ (1400ppm) , 2 x 2k btu mini split a/c, temps range 63-85 w/ 72 average, one humidifier set to run at 60%.
http://www.icmag.com/ic/photo_popup...&prod=albums&ins=link_thumb_2_orig&alb=20506#
http://www.icmag.com/ic/photo_popup...&prod=albums&ins=link_thumb_2_orig&alb=20506#
Ok some background: He says that at night the humidity climbs up to the 90-98% range. Whilst in the day it is 40-60% range. Here is why: When the lights are on the a/c units are on. And the a/c acts as a powerful dehumidifier. So when the lights go out the a/c stops cooling & dehumidifying. Therefore the humidity rises. So far no ill effects have been noticed. Also I do not have PM or any mold issues. And as this place is sealed I do not expect to bring it in thru the air ducting or clones.
In the daytime when photosynthesis and carbon uptake occur high humidity causes the stomata to close, thereby stopping or slowing carbon uptake and growth. At night time this process does not occur. Still the plant does exchange gases at night. ...
It is at this point that my knowledge breaks down.
Here is the question: Is this night time humidity a problem?
See... I got this friend who started a sealed container grow, and he wanted me to post this thread.
About the system: 8k, fully sealed 40' container, co2 supplemented w/ppm3 @ (1400ppm) , 2 x 2k btu mini split a/c, temps range 63-85 w/ 72 average, one humidifier set to run at 60%.
http://www.icmag.com/ic/photo_popup...&prod=albums&ins=link_thumb_2_orig&alb=20506#
http://www.icmag.com/ic/photo_popup...&prod=albums&ins=link_thumb_2_orig&alb=20506#
Ok some background: He says that at night the humidity climbs up to the 90-98% range. Whilst in the day it is 40-60% range. Here is why: When the lights are on the a/c units are on. And the a/c acts as a powerful dehumidifier. So when the lights go out the a/c stops cooling & dehumidifying. Therefore the humidity rises. So far no ill effects have been noticed. Also I do not have PM or any mold issues. And as this place is sealed I do not expect to bring it in thru the air ducting or clones.
In the daytime when photosynthesis and carbon uptake occur high humidity causes the stomata to close, thereby stopping or slowing carbon uptake and growth. At night time this process does not occur. Still the plant does exchange gases at night. ...
It is at this point that my knowledge breaks down.
Here is the question: Is this night time humidity a problem?