Well im still messing up a bit. I finally got ppm under 800 , 799 to be exact. Been running in the 1600s . Just hitthe 3rd week. Thought it was light intensity but it wasnt . Way over kill on nutrients.
The leaves pointing upward that much is telling me the lighting is too intense Growmie, no visual sign of nutrient toxicity. The leaves tips turning yellow or a singed look would be the 1st sign and dark waxy leaves, clawing etc would be signs of nutrient overload. What’s the DLI or PPFD and light schedule 
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12 12 light schedule. I dont have a par meter . So i couldn’t tell you lightis at 75 percent
I downloaded a par testing app, not sure its accurate but it says im at an average of 966 with peak of 1000.
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Also curious as to why light would effect only one of the three like that. But i do know the ppms were at 1900 a week ago, since ive been doing nothing but water ph’d to 6.2 . Ppm is at 150 ish but it is tap water i let sit out in sun for 2 days . Ppm at tap is 140. Then i ad some liquid seaweed. I watered yesterday and ppms are now 700 range so i reckon im ok to feed them next cycle? Also the yellowing started heavily in the bottom of the plant with fans literally turing to a dry crumbly like leaf. Like a dead fall leaf is the best i can explain it. It gradually worked its way up in a matter of 12 days. Now that i have a somewhat understanding of why ppms are so important, i realized i was feeding the girls at roughly 1200 ppms per feeding. When i would water my run off would often be in 1400 to 1500 range. At the end of week 2 on a water day i was at 2000 ppm on this particular girl and this is how she looked ever since. The othe girl same strain is same in color but leaves are flat. And the mauie wowie is even better looking at 6 weeks.
I dont know what to think at this point im at a loss for sure.
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I would recommend setting the light intensity to around 800 PPFD Growmie, some plants react differently to nutrients and lighting even compared to one of the same strain growing beside it. I feed at 800-1000 PPMs and use this as a target. For a soil grow I would recommend a drench to drought routine with liberal run off using synthetic fertilizer
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