Spotting issue consistent in all my grows. Have always thought Cal deficient but more Cal never fixes the issue. PH always checked with 2 PH pens 6.2-6.8.

PH in living soil is more regulated by the soil itself as long as within range it does not have to be super pin point specific as it can adjust itself essentially when in between 6 and 7 correct? That's kind of the point of living soil isnt it?? I don't understand why people are always so quick to assume PH issues on every grow question. Same for feeding.. the plants essentially take what they need and leave behind excess correct? that is the point of PH fluctuation? I don't mean to sound dumb I genuinely am confused and always seemingly receive the same answers on grow questions. Yes I understand the importance of PH. And adding Calmag certainly has not helped.. have had this issue in multiple grows with different nutrients, different concentrations of calmag, and different environmentals and still the same problem. That was the reason I got off the bottle nutrients and switched to dry organics assuming the plant had more control over its feed itself in a way. I appreciate all the help as all feedback does but its been quite frustrating to see the same issue arise at the same time every grow.

6.2 - 6.8 is same qs i am 2 or 55 years old. For soil its 6.3-6.4 Pens can lie ... Have aqua test in hand growdiaries.com/static/post/photo/20573/6219523_grow-journal-by-asnoriuseedsmanalaskan-diesel-auto.jpg Small range like this, helps to understand reading best, compair it to pen/pens ...

Ph. All about it !!!! You need every second feed add a bit calmag under leds, helps for prevention, but all your story its about the guy who followed ph WRONG ;))) Sort it.

Calmag has a high nitrogen content so I try to steer clear of using it - especially in flower... and yeah, your problem certainly could be a lockout caused by too much nitrogen... If it gets worse, you might want to flush. And your pH could be lower... 6.8 is a little high - aim for 6.2-6.4. One thing I've found very beneficial in soil grows when it comes to calcium or magnesium issues is Langbeinite... with an NPK of 0-0-22, since it's difficult to dissolve, I just use it as a top dressing - about 1 tablespoon a month scratched into the top layer of soil. You CAN dissolve it if you crush it up and then bubble it for about 24-48 hours but I don't usually do that... however, if you want to, I would only add 1tsp per gallon per week. I start using it as a top dressing about week 3... haven't had a calcium/magnesium deficiency using this stuff - and, even better, it's organic. With that concentration of potassium, you're also giving your flowers an incredible boost. Good luck!

Soil is a guessing game.. depends a lot on what is left in your soil and what you need to supplement. tho i am assuming it's not some super/living soil context? could be a little N tox... the rust spots could be a coinciding calcium deficiency. Could also be too much P causing a lil lockot of Ca, because you seem to be adding plenty of Ca? High P can cause the dark green lushness too. more than on salt toxicity causes clawing or drooping.