Co2 In A Growroom No Significant Diffrence

Discussion in 'Advanced Growing Techniques' started by trueweedsmoker, Jun 3, 2013.

  1. #1 trueweedsmoker, Jun 3, 2013
    Last edited by a moderator: Jun 3, 2013
    I BEEN RUNNING CO2 IN MY 7X7X7 GROWROOM AT A FLOW RATE OF 4 FOR 7.7 MINUTES AND ITS BEEN A FEW DAYS AND I SEE NO DIFFRENCE.  FROM WHAT I WAS TOLD I SHOULD SEE A DIFFRENCE IN 24 -36 HOURS... EVERYTHING IS SEALED OFF.  AND I RUN IT EVERY HOUR.  ALSO I BEEN USING A.N THIS WEEK AND SEE NO DIFFRENCE.  I HAD SWITCHED FROM G.H 3 PART.

     
  2. SORRY IT WAS A FLOW RATE OF 3
     
  3. your flowering?
     
  4. yup.. i started my 4th week wendsday
     
  5. DO PLANTS EAT MORE WHEN PROVIDING CO2.  SINCE I STARTED MY PLANTS BEEN DRINKING AND EATING APPROXIMATELY 3 GALLONS EVERY 2 DAYS
     
  6. Photosynthesis is like an equation. CO2+Light+Water+Fertilizer --> Growth. When increasing CO2, without increasing light or fertilizer, results will stay about the same. When increasing CO2, increase light + fertilizer accordingly, growth will increase. Hard to explain...Does that make sense? I'm no expert, but I believe this is how it works.
     
  7. [SUB]so your saying when I turn my co2 on increase my ppm's a bit as well as my light to make the plant's utilize the co2 that's added, and if I don't they will just do what they have been doing in the first place.  am I right?[/SUB]
     
  8. One (or more) of the four is the limiting factor.  Rarely is low CO2 the limiting factor.  Usually it's light but it's easier to increase the fertilizer than add light.  I would increase the fert a little and see if there's an effect.  Tell us about your lighting.
     
  9. To: Experienced CO2 users - your opinions please
    \nWhat ppm do you use? - Constant ppm or increase to begin then decrease at end of harvest?
    Do you use CO2 the first week of 12/12?
    Do you use CO2 the final 2 weeks before harvest?
    \nMy planned CO2 schedule for an 8 week flower cycle:
    Begin CO2 at 700 ppm week #1 of flower; 60-65% RH
    Increase CO2 to 1100 ppm week #2 of flower; 60-65% RH
    Increase CO2 to 1500 ppm week #3 of flower; 60-65% RH
    Decrease CO2 to 700 ppm week #7 of flower; 55-60% RH
    End CO2 10 days before harvest; 50-55% RH
    \n*Indicated ppm above includes an estimated 300 ppm CO2 in atmosphere.

     
  10. #10 PhilthyPhil, Jun 11, 2013
    Last edited by a moderator: Jun 11, 2013
    I keep my grow at about 1000 - 1200 ppm, I noticed a HUGE difference when added, in growth speed and size. BTW I'm running 5000 watts, dirt, the whole house and garden line up.
     
  11. Do you notice a huge stretch when using CO2 first couple of weeks? What about last few weeks?
     
  12. Found this in my List-
     
    [SIZE=12pt]Photosynthetic response of Cannabis sativa L., an important medicinal plant, to elevated levels of CO2.      (full– 2011)        [/SIZE]http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3550578/
     
     
    (Check the bottom of my sig, send me an email and get your free PDF! :yay:  )
     
  13.  
    Depending on the strain they all grew accordingly, much faster more vigorous growth, larger end result plant and yield.
    i regulated my ppm at about 1100 the whole time ive never tapered on or off in different weeks of flower, let me know how it works for you if you do it!
    Very nice info granny :p
     
  14. I loved that they referred to cannabis as "an important medical plant"! :yay:
     
    Granny
     
  15. sorry i havent been on, i keep it about 1500. its already 390 ppm's in the air we breath anyway so i add 1120 more, but its to be safe my 7x7x7 room is 343 cubic feet, so at a flow rate of 4 i keep the tank on 7.7 minutes.  i use it all the way through flower, i just finished week 5 tommorrow actually and my buds are 6 inches long.   but i use rock nutrients anyway and finally let my water ppm's hit 2000 for a few days and the plants love it.
     
  16. Temperature is important variable in co2
     
  17. When I grew synthetically in a co2 enriched environment I noticed most significant growth in the veg room. And in the flower room from initial transition till about week 2-3. Starting co2 at week 4 you may see the buds being to swell a bit more than average. Assuming you have your feed schedule, environment and lighting dialed in. When you get to use it for the whole flowering and possibly the veg phase. You'll ask. How did I ever grow with out co2!? It really does make that big of a difference when your shit is dialed in.

    Good luck,
    FF
     
  18. you have to run your growroom at or around 86 degrees farenheit (Sp?) for Co2 to be used effectively. You never mentioned your temps but the 70's aren't high enough as that's the standard everyone uses. I find that my plants actually like more of a humid, warm enviroment than a humid and cool one. The additional waterings didn't really bother me and I grow hempy buckets 3 plants per bucket
     
  19. You need a real controller and maintain the PPMS around 1500 the whole time the light is on.
     
  20. Co2 won't do anything if you're not using a closed circulation system. Unless you can put out more co2 than what's being withdrawn by your exhaust. You're probably replacing all the air in your chamber multiple times a minute. So your co2 is probably just going out with the exhaust air.

    You'd have better luck loading your plants with simple carbs during flowering than co2 in your setup. And it's a lot cheaper
     
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