I had huge issues with PPM with my Dirty Water style of growing. So I ditched the pen( nice Hanna back in storage). When running bennies in the mix I was never sure what was really usable nutrients in the pots. I tried on my consecutive grows to keep the top up bucket bubbling and the PPM stable so I knew the amount added of fresh nutrients to the pots but not sure that got me anywhere. I knew the amount added had xxx ppm but what that did to the mix or how fast the plant was using them I have no idea.
I have the same plants about a week ahead or so. I think I’ve only given them the initial teaspoon of MC1 as initial bucket charge and a few days ago I dumped another heaping teaspoon in. Also at that time I added my bennies and some sugar.
Looks like you got things well in hand. Keep up the good work. Just sharing as I go, I’ve never had the good fortune to watch another exact same strain and medium grow while I’m growing, excited. My first Mephisto also. Structure is a lot different than I’m used to. These seem to really want to force that Christmas tree shape.
FB