co2 decreases potency according to skunk magazine

I don't think it's measured like this. I think it's more like 20% of the cannabinoids found in the resin is THC, as opposed to other types.

If High Times is giving out this information, then that's why I don't read it.

There are different ways to test THC percentages and none of them are an exact science. Some measure THC by using weight by volume (hash to bud) while others determine the amount of THC in the resin glands through different methods. In the end these numbers don't really matter because a plant with a lower THC content could have better resin quality than a plant with a higher THC content not to mention the amounts and different types of cannabinoids play a big role in changing the effects of THC. THC percentages are a marketing ploy pure and simple. If a strain is good it's good, you just have to grow it out and smoke it to find out.

Just because something is printed in a mag doesn't mean it's true. They're just articles written by someone that interviewed a grower. Next month someone could be interviewed that says the opposite. Difference between a good and bad mag is their choice of people they interview and the content they publish. Good mags can publish crap and crap magazines might sometimes publish something interesting and worth reading.

In reply to Buddreams - I grow; Alaskan thunder fuck, Pot of gold, White rhino, Shiskaberry, Jack H, Af-goo, and Yumbolt to name a few. Avatar is Yumbolt.

all the plant sthat i stunted and made small looked really icy
but twhen they are healthy and huge they dont looks as good and everyone thinks the buds suck. they go by look alone usually.

like people have already stated... plants use co2 for photosynthesis- in a sealed grow there is little to no co2 available in the room since no new air is being sucked in. the plants use up the co2, and kick out O2 . without a way to replenish co2 in the sealed grow the plants are essentially suffocating. since the point of a sealed grow is to contain and supplement- co2 in the sealed room is absolutly vital whether it decreases potency or not. having expirience with a sealed grow and also much expirience with passive intake grows, i'd say the difference in potency is negligible at best. ambient atmosphere co2 availability is about 400ppm which i find is absolutly sufficient for indoor growing. just have fresh air constantly being pulled thru your room and the co2 levels remain at around 400 ppm. co2 in an "open" grow is pointless imo. also if the argument is made that co2 decreases potency due to "streching"- then the same is true for bloom enhancers such as H/G shooting powder(i love that stuff!). you can actual watch the lattice work of the trichomes expand as the nugs enlarge, what is required at this stage is to allow an additional 2 weeks for the trichs to once again "tighten up. however this additional 2 weeks proves a pain in the ass as you witness your beautiful milky/amber trichs extend to post maturity (good for medical strains, but not for a stoner like me haha=]). alot of growers will simply not wait. so yea, a delicate balance. i think thc potency is not neccessarily decreased by co2 itself but rather by the delayed harvest needed for "tight" trichome lattice work, time that decays pure THC headiness to cbn and cbd narcotic effects. in this instance the magazine is right that the THC is less potent technically, but the bud itself will still be stoney.