Thanks for stopping in @miyagi been watching some vids on you tube with livingwebfarms awhile back I’m thinking your char was probably charged when bought , on most plants the video states it can negative effects on some crops when not "charged " the crops with noncharged char that seemed to benefit from what I can recall was the Cole crops broccoli, cauliflower and all the other brassicas,
From my understanding the char in your pots will remain forever and your microorganisms will always have a place to hid and reproduce if conditions are right!