I'm skipping past the 80 messages before this and just hitting "post." Don't know if you've got this sorted out or not yet.
High desert now, my friend! Officially a resident of Yucca Valley. I am now within shouting distance of The Integratron, and at least a couple hundred miles away from that storm that's supposed to be hitting the PNW/NorCal.
Ok, gotta stop you there first. If you already know that it's Ca that's driving your pH up, then we know that it's CaCO3 (calcium carbonate). You cannot rely on that form of Ca for your plants.
I personally would like to see your pH range a bit lower given that you're not growing in true soil, but rather a soilless mix. I can't recall, have you tried pushing the pH down towards 6?
A slurry method using a meter is going to be more helpful for you here, as colorimetric titrated drops aren't going to allow you real accuracy. If money is an issue, consider getting those pH strips, often used to test urine, etc. (Btw, they can also be used to test plant sap pH.)
That's not really a 'water' day, you're feeding. Drop the EC. I'll be honest, you've got a lot going on with regard to the feeding regimen there, too, and you're using products I'm not familiar with. Drop the Carbo Load for now, IIRC it's sugar, and there's nothing else that I see that suggests you're feeding microbes here, just the plants.
Lower pH, I feel 65*F at night isn't too cool but raising it won't hurt a whole lot either. However, also raise the daytime temps to about 78*F if you can, get that 10* swing between day and night that so many indoor growers have observed is better, is what I would do here.
If, after doing that, you see the K- isn't correcting, then it's time to add some kelp or similar K component. Give it a week or so. Sorry for not responding earlier, migraines take me OUT.
