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The ladies are all loving the addition of some co2 (via active yeast nomming sugar), and thus far seem to be handling the shift to 24 hours of light quite well. I dropped the intensity to 50% (~= 250W) and raised the light to avoid burn.
The main struggle with the shift seems to be calmag. No surprise, watering with RO, but I’m bumping their calmag at tomorrow’s (13Oct) feeding to 10ml/gal from 5 to try to address signs of calcium deficiency, as nutrient and soil ph look to be on target.