Is this a lack of nutrients?

These are Chemsis and Carnal Knowledge strains, I switched them over to flower 5 days ago, Indoor in soil FFOF 3 gal pots in a 4x4x6 tent using a Bestva 1000w LED light, avg temps in high 70's day low 70's night, humidity avgs 53%, Ph 6.7, PPM last watering was 540, no pest visible was watering every 7 days until this last week they needed H2O in 4, First feed was this watering Blue Planet grow 5ml,micro 5ml, and bloom 7ml with Calmag recommend dose. Not sure whats causing the claw looking leaf tips. This is first grow and hope this isnt too detrimental. Thanks