Setup: Soil+vermiculite (5:2) Temperature in box i...

chasv77, 3.5-4.0 inches to the top from led. Distance became much less. I mean it's seems like vermiculite up ph level (from 4.5 to ±6.5)

RealMedicine, when I gave her 6.0-6.5 ph (in) on veg stage leaves changed the same(week 2). Out was about 7.5 ph

IMO your temps may be too hot for one. For only a 60w light, that may indicate you are not ventilating enough. Are your plants too close to that light as well? Was it the same distance from canopy during veg? I know growing in a box can have lots of vertical challenges. If your internal -> external ventilation is maxed out, you could use c02 (DIY setup) to help those plants more. I have no experience in using ppm as a health indicator of soil . I would suspect that the Vermiculite has no bearing on that. As it just inorganic material used for absorption and aeration. I assume at 5:2 mix, your soil should drain well, so over watering is not an issue(?), unless I am missing something. FYI, Perlite is a little better additive for areation, but doesn't hold nutes and water as well.