Nute Burn or Deficiency?

Pop_a_Bean

Member
So today is day 3 of flower. Plants have looked good the whole grow so far. I only watered with pH balanced water the whole time through veg except the last week of veg. I fed AN Micro-Grow-Bloom pH perfect base nutes. 6mL of each into 1.5 gallons of water. A few days later is when I made the flip. Today would be day 5 since last watering/feed. Smart pots are starting to feel light so the next watering is due (tomorrow).

Shortly after introducing base nutes I noticed white substance on sides of smart pots. Then a few days after that I began to notice some curling leaves and yellowing on the serrations of some of the fan leaves.

All of the new growth looks healthy. Just the older fans have this. Lights were about to go out so I didn't get to inspect them very thoroughly.

Cool mist humidifier and heater are nearest the plants with the most yellowing/curling. Could this be the culprit? Could it be nute burn from introducing the nutes? Could it be some type of deficiency? I am not using any additives at the moment. I plan to use Voodoo Juice and B-52 though. The light is about 13" from canopy.

Also, looking at these pics, would you recommend I trim anything or let it be?

Any help appreciated! Thanks.

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