Looking for confirmation of my plan of attack

Okay folks! so this is my second grow. First grow i learned so much. I was waaaay over feeding them so this go around i am measuring my PPM and PH. I am on week 5 from seed of a red poison auto and 2 honey peach cbd auto both by sweet seeds. They are just now really starting to take off in coco coir and using cannacoco a&b and calmag for nutes. They are inside an AC infinity tent with all their goodies. I keep it around 75 degrees and at least 65% humidity.

My last feeding was almost 700 ppm and 6.1 PH I have been increasing my ppm each week. The runoff last night was 630 ppm and 6.3 PH is this what I am targeting? I read somewhere last night that you shouldn’t try to keep your PH exactly the same each feeding because the plant can uptake different nutes at different PH’s. Is that generally accepted?

Here’s where i am confused. On the second set of leaves i got some discoloring on the leaf which i think is pointing to PH fluctuations? I have tested and been around .2 difference for each time i have fed them. I am using purchased pre-buffered coco, so any ideas what i could be doing wrong? the top few leaves all look great vibrant green. Should I not worry? or should I… that is the question.

I will update this with a pictures when i get home from work today.

~1,000 PPM.

The proper pH range for coco is 5.8 to 6.2. I would get your pH nearer 6.0. Anywhere in range is fine and I know of zero experienced growers who manipulate pH inside the range for nutrient uptake. It’s difficult enough to just keep it in range, let alone target specific values. Manipulating pH inside the range just isn’t realistic.

Discoloration is not always problematic. Pics will enable us to help you better.

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