Nute deficiency ?

It looks like the very early stages of nitrogen deficiency, I would not be too concerned as you can correct this easily by feeding more nitrogen.Do you grow in Soil or a hydroponic system?
 
With the feeding of you plant/plants are you ensuring that the medium remains saturated with water and there is run off (10%-20%)?Treat Coco as if it where a hydroponic system, watering till run off is seen, this ensures that the nutrients are being refreshed so that the plant/plants can develop optimally. Sorry to say I am not familiar with pbpg (I use EHG Coco nutrients.).
Hope this offers some help.
 
175w led 5k
I have 4 going atm
 

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Doesnt look bad either way but I was going to guess very early mag deficiency but it's a guess. I say this one because the way it appears and also because coco can be prone to mg deficiencies.
 
You don't need to water plants that small daily until runoff. Even in coco. I grow in coco. Plants that size don't need daily watering. The coco will stay damp for a couple days. You don't want to let it dry out but the roots will grow better in damp coco over wet until those plants get bigger. You CAN over water in coco if you have plants that small in pots that size. They are not drinking enough to dry out the coco and you're daily watering is keeping the coco too wet for the roots to grow like they should.
 
update
feeding 5 mil calmag
pro blend pro 10ml
per gallon 800 ppm
Ph 5.7
looking wrinked and other one is yellowing
 

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800ppm is a lot for that little plant. Is that 175w at the wall or listed? If it's listed it's really about 90w at the wall.
 
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