Neon looking with darker green striations, with brown spots

[Camer41]

Wondering if anyone could help me...
Growing in coco plants came from seed and are 45 days old. Growing with mars hydro 150 led. Using green planet 1 part and I’m following the schedule for veg. I’m on a 18/6 light sced. I thought it might be light burn but the plant beside it isn’t showing these problems. Using filtered tap water and letting it sit out. Using digital calibrated ph metre. Have a look. I’m pretty sure the brown spots are cal/mag but the neon off green yellowing has got me scratching my head

 

[PK]

perhaphs a nitrogin deffeciency. try to compare your plant to the pics on this link.

Plant Abuse Chart

Heat Stress : Look closely below, and you'll see the brown leaf edges that are indicative of heat stress. This damage looks alot like nutrient burn, except it occurs only at the tops of the plants closest to the lamps. There's only one cure for this...get the heat away from the plants, either...

www.420magazine.com