Simple questions

I have been at it as long as you,longer in fact with some breaks and I beg to differ.In know way does proper ventilation(300ppm) increase the metabolic rate of a plant as would co2 inhancment in excess of anything beyond 300ppm in veg or flower.I run a generator off propane with air cooled hoods and co2 augmentation has on every occasion out yielded the non-augmented with many different strains.Plants use Co2 to manufacture chlorophyll and also for the process of photosynthesis to manufacture starches which are initially carbohydrates with the carbon in carbohydrates being derived from carbon dioxide.Yes,people using co2 can run into problems as augmentated plants do require alot more nutrients and water to maintain the increased metabolic rates brought on from co2 at increased rates above 300ppm.Plants transpiration is changed as well under enrichment as stomata closes slightly thus slowing down loss of vapor to the air creating a fuller and healthier plant with prolonged life prior to wilting.I am sorry to hear ya had little improvement when ya used co2 10 years ago,but 1000's of nurseries to this day use inrichment indoors for out of season crops thru both veg and flower with increased yields of what they get outdoors not to mention big growers of cannabis.You would not happen to be rangerdanger from growkind?Peace

 

I see.
And what CO2 ppm do you run during lights on? How do you exhaust excess CO2 during lights out, when the plant stops converting CO2 to O2 and reverses the process?
And how do you regulate it, to keep it at optimum levels (1200 ppm)?


I stand by what I said. for the average home grower, excellent ventilation is more cost-effective than CO2 aumentation.

Faster does not necassaily mean bigger or better.

 

I run elicent fans which with carbon filter as exhaust in between the co2 cycles which in turn gets me to 1500 ppm and by the time levels drop to 1200ppm the process begins once again.Co2 is not run during lights out and in fact you probly know as well as I that respiration takes place at this time where plants take in oxygen and release co2.the ole saying,"photosynthesis minus respiration equals growth".I completely agree with you on for the average homeowner the most cost effective way is proper ventilation.You are also correct that faster is not better,but time saved is better then time lost.I have found that and as well as scientific studies that enrichment above ther norm does increase female ratio.The way my conclusion has came forth was via doing same strains as fellow gardeners while maintaining similar climates with the exception of the co2 and female ratios in every situation came in higher.I have enjoyed this comparitive conversation as well as the other responses you have made on other threads.Knowlege shared via pragmatics is far more valueable then any book will teach so keep it up,its great to have another here willing to share that knowlege.Peace

 

Wait a second.
You're saying that CO2 augmentation affect sex? Never heard of that. Everything I raised under CO2 augmentation were from female clones.

What kind of atmospheric ppm meter are you using?

When I was augmenting with CO2, I switched to 12/12 when the plants were 15" tall.
It took 21 days with excellent ventilation to get to that point, vs. 17 or 18 days with 1200 ppm CO2.
And it had no affect on the ultimate size or potency of the buds.

I live very remotely, grow just for myself and a few friends (fuck the supreme court btw), and I found it a big hassle to lug the CO2 tank to the welding shop every 2--3 weeks at $17.00 a refill. Back in those days I was also concerned about stealth, since most people have no need for tanks of CO2 every few weeks.

 

Absolutely increases females in comparatives I have done and there has been scientific studies that come to the same conclusion.I dont use any expensive co2 monitoring equipment that enevitably will fail as for pennies on the the dollar I can test the air via a co2 detector syringe with cheap test tubes.I got a line on the test tubes for next to nothing.just a matter of knowing the size of your room and output of the specific generator in use and then the time it takes for levels to drop to a specific pre-determined level and then process repeats itself.depending on room size it takes me on avg 3-4 test tubes to dial in the on/off times for the gen/fans/etc with the knowlege of knowing I have no expensive monitoring equipment to fail.I use 2 small propane tanks(5 gal) with a splitter that automatically switches from 1 tank to the other when one runs out and on average I have to refill a tank every 20-25 days depending on room size(average cost per month is $10),propane is cheap but natural gas is even cheaper to run.I agree with ya that its time which is saved, with no improvement in quality ,but I get on average 10-20% more yield in a shorter time.I have been doing alot of bean making as of late as I have access to many great strains and figured I will get my count up as I truly believe a plant from seed is more vigorous then any clone.Like you I dont grow for nominal value but for private use and to share with less fortunate people.I veg on 18/6 avg 3 weeks then do a steady count down to 12/12 droping a hour a day and by the 6th day of the 4th week I am typically sexed.I like the more natural count down with whats found in mother nature as it will lessen males when ya think about how there is a chance for stress when abruptly changin light schedules.I have fellow grow buddies here in the states as well as a owner of a well establised seed bank north of the border that swear using liquid kelp with all waterings the first 2 weeks veg will increase female primordia.Outta time ,rap some more later.Peace