Could that be light burn?

That was the plan, thanks for your help bud.

I'm only 3 weeks away from harvesting just to add.

I only water in between feeds with 0.3ml biobizz calmag. I use biobizz ph+- to adjust pH to 6.3-6.5. I was thinking lowering grow big cause that has the most nitrogen in it.

Is grow big your yeg nutrient. Never used fox farm. If it is then lower that and increase your bloom if they are liking the strength of feed. Do u only feed or water inbetween feeds. If your soil ph is fine it can't be that.

Feeding fox farm twice a week as recommended although giving less food than recommended. Grow big 1.4ml/l Big bloom 2.5ml/l Tiger bloom 1.4ml/l With daily watering 0.3ml/2l biobizz cal mag Seems like it is more coming out on the top, checked soil pH, it is between 6-7.

I would say its probably from over feeding or incorrect ph rather then the lights. Some leaves are looking a bit burnt on the tips and some are going a dark colour. This would be from a build up of nitrogen. Because your not running a diary I'm only guessing.