Is this nute burn or a deficiency? HELP!!

In FFOF haven’t fed any nutes other than so Mamoth P micros and a very small amount of that with the water Ph at 6.3 and they are about 30 days into veg
I’ve heard that the FFOF is hot but this also kinda looks like a calcium deficiency to me but I don’t know much. HELPP!!
 

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What size light are you using. I would think 30 days of veg it would be a little bigger.

Tap water I assume?

Also I don’t feed for about 30 days so if you’ve been giving it anything within that 30 days. It’s most likely burn. And I’m using a 600w HPS and it’s a huge plant.
 
It’s an HLG 300 blue spec and it’s on max wattage but I think I had it a little high it was like 19 inches from the plant I’ve moved it down to about 14 now
Ok well I’m not sure about that light but I can tell you that if you feed micros in that hot soil it’s probably a nutrient burn. Just my 2 cents wait for others
 
I also think I was overthink the over watering thing. Always thinking I was overwatering but I was definitely underwatering so that could have something to do with it
 
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