Resolving nutrient lockout

you were overfeeding the plant from week 6 on, it looks like based on the diary. That's the primary cause of the curling and damage. 1,3-1,5 ec is a much better range to be in. you can always test a particular plant's boundaries, but most like this. Relative to environemtn, when near what is needed to provide for max growth rate, it takes weeks if not a month or more before you see if it is something that is building up or becoming deficient in the leaves. Then, you have all the relativistic relationships among the various nutrients in fertilizers to contend with. It's fairly complicated. You can see the research represented in various hydro nutes like southern ag's, jack's, masterblend etc.. they all have a base of 5-12-26 plus or minus a bit here or there, and paired with calcium nitrate. these ratios have been systematically resolved through cross referencing more data than any one of use can possibly accrue with a small garden, or even a big residential garden. it ends up being somethign like 1:1:2 (7-7-15 is a better resolution, if i recall). Do that at 1,3 to 1,5 EC and enough ca/mg/s relative to your tap water, and bam.. it's smooth sailing. minor adjustments that take weeks or longer to see the results after that.