UB,
On my last grow I got a 4 oz. container of Roots Organics "Oregonism" (endo/ecto mycrorrhizae) and watered it in per instructions shortly after the seeds sprouted. When I depotted after this last harvest, and examined the root balls I couldn't see where it made a dam bit of improvement over what I'd had the crop before that when I hadn't used it.
Admittedly this wasn't the most scientifically conducted trial but it was enough for me to decide I wouldn't be spending any more money on that particular ptoduct.
Jack
I understand, reason why I started this thread with the caveat emptor tone. You're speaking from experience, not theory the latter based on hype, ads, claims, etc. If a seller is saying such and such, WATCH OUT! They have one agenda and one only, to make money. They are not necessarily your friend nor are they your agent looking out for your best interests. Look, the human element is such that "people are dreamers, and con men fulfill that dream." (especially when applied to cannabis growers who are probably the biggest group of dreamers I've ever met)
IOW, if it sounds too good to be true......
I have always used tapwater which was high in chlorine and had no problems. I lived right next to the water processing plant so the ppm was at its highest level as opposed to being 40 miles at the end of the line where the Cl levels greatly fall off but are still concentrated enough to provide sanitary water.
Check out some of the rootballs, do they not look healthy, robust, etc.?
https://www.rollitup.org/general-marijuana-growing/9114-spin-out-chemical-root-pruning.html
My plants rootballs are ALWAYS very massive, well branched and healthy at harvest as reflected in the many posts of them over the years.
Fellers, when is the last time you measured your soil's microbial count? May I borrow your high tech lab equipment, electron microscope, etc.?