Is this nutrient burn?

The singed leaf tips look like very slight nutrient burn. At first glance, the discolored mottling on the leaves looks like Calcium deficiency.

What are grow medium, nutrients, feed/water sched, ppm/ec, pH, temps, RH, light specs/distance? Have you inspected thoroughly for bug pests?
 
Tracker said:
The singed leaf tips look like very slight nutrient burn. At first glance, the discolored mottling on the leaves looks like Calcium deficiency.

What are grow medium, nutrients, feed/water sched, ppm/ec, pH, temps, RH, light specs/distance? Have you inspected thoroughly for bug pests?
Click to expand...

I'm growing in dwc using Canna coco at about 2.6 EC, pH set to 6.1 I have been having issues with temps getting up to around 28-29 Celcius and Rh between 50-60, light is a kingbrite 480 watt and have gone right over it and no signs of and bugs
 
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