I need help identifying the deficiency on the lowe...

You do have several issues present on the leaves. First i noticed soil then saw 5.8 PH ? That is pretty low and could be causing lock out soil is generally 6-7 PH 6.5 being around the best but some sway is ok. You only want to be under 6 if using Coco. Imo fix the PH and add a low dose feeding. You shouldn't need bloom in veg micro and grow should be enough. Good luck.

That’s not cal/mag at all it’s phosphorus/potassium burn plants of that size shouldn’t be getting any nutes yet. The burn isn’t severe but it is definitely not a cal/mag issue

Yes it looks like a cal/mag related issue, but you also probably have a boron deficiency. Good luck with these beauties bro!

Imo it's a cal/mag for sure. If you don't have any on hand, you can use some Epsom salt or even a small amount of molasses (1/2 tsp./gal.).. Calimagic is what I use, and I haven't had an issue since using it.

Pretty sure it’s a Calcium, Magnesium or manganese issue.have you introduced any neutrients to your plant yet other than the ones in the soil and what soil did you use.

It does look like a Cal/Mag problem , but it can come from many different factors.