Massive nute burn?

[Muewy]

Hi friends,

Need some advice on this.
it looks like to be severe nute burn, just wanted to confirm. This always happens during week 6-7 of flowering. The roots do sit in about a inch of water
but the PH and PPM matches the reservoir
using a recirculated drip system with 4times a day every 4 hour 15 minutes drip.
Ph sits at 6.0.
PPM 600, using remo nutrients.
Light cycle 12/12
Rh is about 40%
Temp i run a little hot at 75

[Gluteous]

Nute burn wouldn't be that color. Looks more like a deficiency. The fact that it always happens in week 6-7 means you gotta make some changes to the environment or …? Hopefully someone familiar with you setup will have some advice.

[Farmall]

How close are your lights to these leaves?

[Muewy]

How close are your lights to these leaves?

20 inches away from the tallest cola. 600W LED

[Farmall]

Thinking out loud but with LED’s some plants could be sensitive to the intensity so maybe try rising to 28” or even 30” and see if new growth develops properly. You MIGHT be looking at a potassium problem but I might suggest a simpler solution like raising the lamp