Hello
So i think the majority of these bottled microbe companies or "instant teas" are reporting false numbers, or you'll find the microbes to be dead or dormant. You'd have much better luck and numbers with an ACT. However....if you're going to use a bottled microbe, i would use mammoth p(you could try others too and maybe do a controlled experiment) but the key to any of these is feeding the microbes either with molasses, a organic meal, or catalyst. And more luck still by brewing like a compost tea for 24 hours. With the high costs you really want the most you can get and that really comes with a 24 hour brew...sheesh even a 12!
Ive tried doing innoculant at germination and I can't say with true confidence that it's ever done that much on its own. I felt like i saw some positives while using xtreme Mykkos when transplanting, but it may just be coincidence.
Do your research, find out if the specific company is reporting genuine information, not saying 10,000 spores when there's actually 500. And use wisely.