Nutrient burn or deficiency?

Beavercat

Member
I'm growing this Durban Poison sativa in a 5 gallon bucket with 3 gallons of water. I'm using distilled water with general hydroponics nutrients. I'm putting 1 1/4 tsp of hydro bloom, gro, and micro into the solution. The ppm is 300, and the PH is 5.7.

I'm using a 450 watt led vipar spectra light, and I have a small fan for aeration.

I just switched from 180 ppm to 300 ppm because I assumed nutrient deficiency. The bottom leaves died off becayse there were too many ppm in my tap water. The shriveled leaf next to where I topped it broke when I was bending down slightly.

What gives with the brown spots and slightly curled leaves?
 

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