I'd like to hear your thoughts on mainlining, if you get a chance.
Nice that the VPD stays right at 1.0. I'm in Southern California so I can't do a summer grow. July/August will be a challenge for you. I looked up "hot and humid" in the dictionary and it showed a picture of Maryland!
I used Fox and Botanicare but switch to Jacks 3-2-1. Bottles are convenient but it only takes a few minutes to mix a batch. The labor is pumping out the res. My res holds 28 gallons so it's really stable (pH and EC) but I have a to run a sump pump to move around that much water. I only do three res changes during a grow so it's not all that bad. You're dealing with a lot of water, as well. Between the totes and the res, how many gallons in your system?
"I'm never going back to soil lol"— I hear ya. Hydro requires more think time up front but there's no mystery about what your plants are getting.
I checked out your "buckets" and "reservoir" and the buckets look like storage bins. Is that a DIY system?