Hi my fellow growers, I have moved from tents and a negative airpressure in a lung room for years back into a dedicated open room again.
I decided its time to try and push things to the next level. I have managed to constantly yeild 300-350g per m2(10.7ft2) dry nugs no bottoms or sugar included. With 3-4 week veg and 7 week flower so really fast turn around. I used a mixture of 720w bar leds and 600w digital hps in coco mix perlite ect. Hand water 1500 ppm low 6s ph. In 3 gal pots a bit less than half gallons waterings
Now i have decided to get rid of my tents and go sealed room for full climate control and add 2 minisplit ac units for redundancy so its 2.5ton together.
Room is 13ftx20 and 7ft 11inch high
I have a massive co2 tank and regulator and controller hooked up.
Im running the room at 84f-88f lights on with 60-70%rh chasing vpd and 78.8f-81f lights off.
I run 3 x 60pint dehumidifiers on different locations 2ft off the ground ontop of a black storage tub. (i know i need Way more then that but funds are limited for now its eating power lol)
C02 running at 1000-1300ppm (i have read so many mixed opinions on what to run) and i have set mine lower today now running 650ppm-1050ppm
Running 1000-1200 ppfd light from mostly 720w bar leds mixed with a 600w hps here and there.
I have did the whole conversion to a sealed environment in week 1-2 of flower that wasn't to ideal. So im new to a sealed room i have many questions.
I have tried to give as much information as possible obviously there is always more i could try and give but i only have so much time. I have 64 3 gals running now with 4 720s and 2 600w hps week 3 of 12/12 for reference.
So my questions are:
1: I have 2x 8inch pipes from the rooms roof that i used to use for a negative pressure so i dumped all the hot air out and let the cold air come im without a fan on the other pipe. Since its probably 7+ foot high on the roof will co2 leak out of it if i leave it open but negative pressure fan off and inlet side open? Since c02 is 50% more heavy then air in theory without a fan pulling air out will i lose major co2? The reason im asking is ive heard its good to vent your air out for 30mins or so on lights off to get rid of unwanted gasses? and for c02 levels to be ambient and not super high during lights off. Opinions? Ive heard many mixed ones... But id love to hear more.
2: C02 levels during veg and pre flower and mid to late flower.
3: feeding ppm in veg, flower ect with Co2. Added Silica? Calmag?
4: i want to run 6-8 720w lights and either do 100 girls in 3gals or cut it down to say 26-36 in 6.75gal buckets? Obviously longer veg what size dehumidifier do I really need some people say you need to size it for the room and others say for the amount of water you give/want to remove from the room. Im considering a 190 pint industrial dehumidifier to replace the 3 mini units but i might need more then just that?
I'll leave it at that for now
Thanks for your time and input it is really appreciated!
I decided its time to try and push things to the next level. I have managed to constantly yeild 300-350g per m2(10.7ft2) dry nugs no bottoms or sugar included. With 3-4 week veg and 7 week flower so really fast turn around. I used a mixture of 720w bar leds and 600w digital hps in coco mix perlite ect. Hand water 1500 ppm low 6s ph. In 3 gal pots a bit less than half gallons waterings
Now i have decided to get rid of my tents and go sealed room for full climate control and add 2 minisplit ac units for redundancy so its 2.5ton together.
Room is 13ftx20 and 7ft 11inch high
I have a massive co2 tank and regulator and controller hooked up.
Im running the room at 84f-88f lights on with 60-70%rh chasing vpd and 78.8f-81f lights off.
I run 3 x 60pint dehumidifiers on different locations 2ft off the ground ontop of a black storage tub. (i know i need Way more then that but funds are limited for now its eating power lol)
C02 running at 1000-1300ppm (i have read so many mixed opinions on what to run) and i have set mine lower today now running 650ppm-1050ppm
Running 1000-1200 ppfd light from mostly 720w bar leds mixed with a 600w hps here and there.
I have did the whole conversion to a sealed environment in week 1-2 of flower that wasn't to ideal. So im new to a sealed room i have many questions.
I have tried to give as much information as possible obviously there is always more i could try and give but i only have so much time. I have 64 3 gals running now with 4 720s and 2 600w hps week 3 of 12/12 for reference.
So my questions are:
1: I have 2x 8inch pipes from the rooms roof that i used to use for a negative pressure so i dumped all the hot air out and let the cold air come im without a fan on the other pipe. Since its probably 7+ foot high on the roof will co2 leak out of it if i leave it open but negative pressure fan off and inlet side open? Since c02 is 50% more heavy then air in theory without a fan pulling air out will i lose major co2? The reason im asking is ive heard its good to vent your air out for 30mins or so on lights off to get rid of unwanted gasses? and for c02 levels to be ambient and not super high during lights off. Opinions? Ive heard many mixed ones... But id love to hear more.
2: C02 levels during veg and pre flower and mid to late flower.
3: feeding ppm in veg, flower ect with Co2. Added Silica? Calmag?
4: i want to run 6-8 720w lights and either do 100 girls in 3gals or cut it down to say 26-36 in 6.75gal buckets? Obviously longer veg what size dehumidifier do I really need some people say you need to size it for the room and others say for the amount of water you give/want to remove from the room. Im considering a 190 pint industrial dehumidifier to replace the 3 mini units but i might need more then just that?
I'll leave it at that for now
Thanks for your time and input it is really appreciated!
