Overwatering, light stress or nutrient deficiency? Help!

[EdwardSnorton]

Hey all, this is my first post so maybe someone can help me out (soil). I'm 14 days into flower and my most vigorous girl in veg is starting to slow down and show some strange new discolored growth. I thought it may have a watering issue as I gave a very thorough watering 5 days ago, but the 4 others have all bounced back except for this one. This pheno is also slightly larger than the rest so I assume it could be going deficient or thirsty a little earlier. I should also add that the PPFD from the LED I’m using is way too high and cannot be dimmed down or raised up anymore. What do you guys think? Does it look deficient, locked out, over/under watered? Light stress? My eye for reading plants is not fine tuned so any help is appreciated!!!

Here's some info about my grow,

-Dosi-face (seed) - Archive seed bank
-Using a local ‘supersoil’ blend with 30% perlite
-Went from 1.7gal to 5gal
-Been in a 5 gallon fabric pot for about 30 days
-7.5pH 200ppm city water
-No signs of nitrogen deficiency on lower canopy
-Plants got slight N tox in veg
-All other plants look healthy
-5x5 tent
-700w LED @28” above canopy
-75f/60% day 70f/60% night
-Passive intake, exchanges every 5 mins

 

[Imone]

It's not light burn, it's too low. They don't look over watered or under watered. I'm thinking a nutrient deficiencies or lock out

 

[mysticepipedon]

What's the pH of the soil? Obviously, your water is a little high.

 

[Mugwort]

Leaves appear to be cupping...overwatered.

 

[ComfortablyNumb]

It looks really good actually. Right on the edge where it should be.

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