Autos in soil, starting to have problems

I am struggling with autos in soil mostly because I am not very good at understanding what the plants are telling me. I starting keeping track of the TDS hoping that would at least give me some repeatability if I ever get things right. So, growing 4 in Fox Farms happy frog with additional coco and perlite. My well water reads about 125TDS and I am in the beginning of week 4 using Fox Farms Grow fertilizer gradually getting up to a TDS of 430 right now.

So, does this look like too much or too little or some other deficiency?

Thanks for your help as always!

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