I’m not an expert at growing cannabis but I am an organic field farmer. A product I like is called Biomin. It has a touch of nitrogen. The calcium is mineral derived. It’s not readily available but it is very microbial active and shows results quickly enough. So basically the microbes on the leaf surfaces will consume the minerals and poop them out to become available to the plants. Truthfully though it’s best to use that at the very beginning of deficiency symptoms and then once every 4 days or so until it clears up.

They also make a magnesium product, as well as a trace minerals.

A word of caution about calcium chloride foliar sprays if that’s your source. They act fast, but they can have an inhibitory effect on nitrogen and phosphorous. If you use calcium chloride, definitely use less than recommended or you may see other issues arise!!

If you do hit them with a fast acting calcium, I definitely recommend a follow up foliar a few days later with something that has fulvic acids to counteract the suppressive qualities of fast acting calcium based products.

But again I’m not a cannabis expert and I’m not sure how reasonable it is to use foliar sprays on flowering plants, or how best to address leftover residues in the absence of rain. The products I mentioned are not toxic, but I’m not sure about potential corruption of flower flavor.

I think you need to do a runoff test. It looks like you have a lockout from something. Usually when you see that many different problems at the same time there is too much fertilizer in the soil. People mistakenly think they are seeing a deficiency and add even more fertilizer (that includes calcium and magnesium, which usually has iron as well). I am inclined to believe this even more since you said you are on the max dose and your light distance seems a bit far imo. I think the max rate for the grow dots is your problem. Unfortunatly, since they are partially slow release, there is no real way to remove that completely. Best advice I can give is to come back with a runoff ppm and ph. If your numbers are very high then remove as much of the grow dots as you can, flush the soil with water until readings are consistent and then perhaps add 1 tbsp per gallon rather than 3.