HALF??? Not even close...
For my Critical+ 2.0, the last few weeks were:
Base (Tap) water ppm: 180
Megacrop: 1.02g per gallon
CalMag Pro: 1.02g per gallon
Sweet Candy: 0.4g per gallon
Bud Explosion: 0.5g per gallon
Total PPM: 570 (PPM 500 scale, so 1.14EC)
Adjusted ppm (tap water ppm removed): 390ppm (0.78 EC)
**Measurements using US gallons cuz that's what Greenleaf use instead of real gallons**
The Critical was VERY calmag hungry, but didn't want/need much of anything else
LUX meters are pretty rubbish for COBs and LEDs and only accurate with HPS/MH