PICTURES: Curling Red Trimmings on the side of leaves. PLEASE HELP

This plant is 8 days into veg


mY 400 w hps IS 30 in above these. Foxfarm Nutrients at 1/2 strength. Temp 78, PH 6.2-6.6, Humidity at 60-61.

Is it burning?

Any Help is appreciated.

how long into veg or flowering are they? how often do you irrigate them? if you water them with 1/2 strength foxfarm (grow big?) I would suspect over fertilization, and switch to flushing or irrigating with tap water maybe let it dry out for a day first, if it bounces back try 1/4 nutrients if you want to fertilize every time you water

They are 8 days old into the veg room. So i should probably lower the nutrients are change my water.

I live in the country and my water is hard and stains our sinks, thats why iv been using purified water. Any more advice?

Thanks for the tips.