Curled tips, overwatering?

Hey guys, Im handwatering coco at 78F 47RH with floraflex flood tops in 6 inch pots. I water about a gallon distributed between 3 plants every day.

Im using HLG 300 and an auto cob 150w about 30 inches from canopy.

Ive noticed the leafs underneath the buds are curled downward, kinda looking like a claw.

Can anyone tell me if theres anything wrong with my plant? Out of the 3 theres only 1 doing it.
 

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It looks like Nitrogen toxicity, I use just 0.6 EC into early flowering and raise 0.1 EC per week adding just P/K to the regular coco flowering nuts. I usually end in late flower with 1.0 or 1.1 EC depending if they didn't show me the nitrogen toxicity that you have.
 
In addition to that the plant it's clearly telling you that it has nutrient excess in the burned tip of almost all leafs, remember less is more.
 
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