Help Please

Hey guys, I am having a small problem with some and I was hoping I could get some help with it now before it gets worse. I have attached a picture and I am running these ladies in a deep water cutler at 75 degrees, 51 percent humidity, 1250 PPM CO2 24/7. Using a 1000 Watt MH bulb that is air cooled with a hydro farms 400 CFM fan. Lights are on from 5:00pm until 11:00am (18 Hours) Light is hung off the ceiling 6 feet above plant level. I started foliar spraying week one and I have been doing that twice a week until now. This pic is week three of veg and the nutrient PPM is at 650. Started at 250 week one went to 400 week two and ended up at 650 week three. The red squares are my area of concern. Thanks in advance for all you input

Man..it bugs me to see a post with no replies. I guess they just get buried sometimes though.

Bare with me if this is a stupid question, but are you spraying with the lights on? The areas you
outlined in the pics look like where excess moisture would collect (tips and edges). With 1000w,
even at 6', any drops on the leaves are gonna act like a tiny magnifying glass. That happened
to me before; the tips of the leaves looked like they'd been dipped in boiling water. Not really
burned, but cooked. Hope that helps. Good luck.

Thanks man. It makes sense, but according to liquid light you are suppose to spray with while the lights are on and they need a minimum of 8 hours of light after spraying. Maybe I am using too much and it is rolling down to the tip.