The only REAL advantage to using C02 is that you can grow plants at a higher temperature
that it..! thats all, the assumption being that with higher temps you will be using more lumens
this is no biggy, if you are using more lumens, then your plants will grow bigger and faster ..
hence the more nutes you require, thats the theory anyway
Yes you must watch your nutes and temps,
if you get 30% increase in size and volume
it does not mean you need to add 30% more nutes
Every grow set up is different very very different
C02 is not for the noobie at least 5 grows are required(imo)
So thee nooby can dial in his setup very well indeed
thats not including any prior experience
many C02 user fall by the way side very quick
due to the costs involved, or the time dialing it all in
good luck
This is not exactly correct!
Our Plant has a light saturation point. At that point it begins to change on the cellular level to protect it's self from the light. So it does not get damaged. (you would be surprised how early in the day this begins) This reduces photosynthesis and that reduces all the other growth process's too. Night time comes along and the plant reverses these changes to be able to again, utilize the light fully.
Co2 increases the time that the plant is working full strength by delaying that saturation point and the plant physically slowing down.....
For C02 to work at peak effectiveness, you MUST.
Run 1300-1500ppms of gas during lights on
Run 1k lighting
Keep the temps at 86F lights on
Control the RH to 75 - 80%RH lights on
With less lighting you must run less gas, temps and less RH - you also get less effectiveness!!! So gassing under less lighting is less effective and adding cost that does not return well......Run the 1K's or forget about gassing is best.
You will now have to water about 30% more/often as the plants effective growth is now increased by about 30%.
Logic says that if the plant grows 30% more effective the plant is up-taking 30% more nutrition daily....
I have never decreased or increased my feed concentrations when gassing, just had to water more....
If you feed heavy and it shows - you will most likely have to reduce your nutrient concentrations when gassing..
V is buzzing around the correct answer....The more light you use the more gas can be effectively utilized by the plant. The plant now needs higher temps and RH per the VPD rule....to effectively utilize the increase in gas....Higher temps do not increase plant growth effectively otherwise. 85F and the plant is slowed way down in it's growth. At 90F the plant will in effect be not growing at all. As temps rise the plant spends more produced energy on cooling it's self.....So it's the increase in ability to effectively use the available light...The rest simply follows as these are limiting factors after lighting.
BTW Lumens are not technically how you should measure light for plant use Umols are better.....Light meters measure LUX and/or Foot Candles (fc). LUX is Lumens over a given area = 1 LUX is 1Lumen per meter squared..
Doc