Hey this is my first was wondering if you all could give me some help. I'm using 3 gallon pots, happy frog, 400w magnetic switchable ballast with a mh bulb, I'm using heavy 16 nutes just grow a & b for right now adding additives next watering, and the plants are about 5 weeks old. 4 days ago I noticed the leaf tips curling on some branches and these pictures are from yesterday. Any help you all could give would be much appreciated this is my first go round at this.