need help with heat problem

lokipor

lokipor

Member
i've got a 5x10 grow room with 7 foot ceiling, two 600w air cooled lights with reflectors and am having a hell of a time getting the temps below 85 at the top of the plants but no matter what i do all the girls are drying up and losing their fan leaves, first the leaves get yellow spots that turn brown then dry up and fall off
i have two fans running circulation and a 33 can filter with a 460cfs pulling the air whrough the lights but it isn't enough to keep the heat from the lights cool. I also have air conditioning running in the room but still the lights and room temp are to much. my question is would running a co2 setup in the room help and how do you keep the co2 in the room with the exhaust running. any help or ideas would be greatly appreciated. I just finished a 12 plant ugly grow and would like to get a 12 plant pretty grow this time. the harvest of the 12 3 foot plants was just over 2 lbs dry and i know it could have been better
 
mistaphuck

mistaphuck

Well-Known Member
might try applying co2 during your night cycle, that way you could turn off your ventilation, and just have one fan on, low.
other than that more fans would be an option. never hurts to have more fans.
 
SmoochieBoochies

SmoochieBoochies

Well-Known Member
Hey dude, it sounds like maybe your relative humidity is really low. Have you checked rh? 85 degrees should not be causing that kind of problem unless the air is very dry. Running the a/c all of the time with fans will dry a room out quick, especially if it is dry outside. Look into a humidifier. Hope this helps!

lokipor said:
i've got a 5x10 grow room with 7 foot ceiling, two 600w air cooled lights with reflectors and am having a hell of a time getting the temps below 85 at the top of the plants but no matter what i do all the girls are drying up and losing their fan leaves, first the leaves get yellow spots that turn brown then dry up and fall off
i have two fans running circulation and a 33 can filter with a 460cfs pulling the air whrough the lights but it isn't enough to keep the heat from the lights cool. I also have air conditioning running in the room but still the lights and room temp are to much. my question is would running a co2 setup in the room help and how do you keep the co2 in the room with the exhaust running. any help or ideas would be greatly appreciated. I just finished a 12 plant ugly grow and would like to get a 12 plant pretty grow this time. the harvest of the 12 3 foot plants was just over 2 lbs dry and i know it could have been better
Click to expand...
 
dannyboy602

dannyboy602

Well-Known Member
You can't run CO2 at night. The stoma are closed and enrichment is wasted. If you run CO2 during the day, mb do it in cycles.
Do you have a Cap burner or a tank with a regulator? The dif is HEAT. Also when you use CO2 you can run temps about 10 degrees hotter. But turn the exhaust fans off. Carbon Dioxide is heavier than air and will sink to the ground. When I did my first (god bud) grow my temps were near 95. I had the burner running most days in flower. Exhaust fans running at night. Everything turned out great.
 
aesan

aesan

Active Member
Hey bro, I had the same problem.

Try inserting co2 and putting it somewhere above your grow because co2 is heavier than oxygen and it will sink.

Adding co2 at night time won't do much because of your high temps they really need it during the day to keep their pores open for photosynthesis. but adding it during the day would probably help tremendously.

Get a ppm meter and be safe! you want to keep your ppms around 1400-1500
 
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