Here we go. Mixed up my water / nutrients this morning as follows: RO Water volume: 5 gallons GH Micro: 15ml GH Bloom: 30ml Technafloura MagiCal: 5ml Hydroguard: 10ml The soup above resulted in the following numbers: PPM: 410 EC: .8 After correcting the PH to 6.2, I drained and refilled the reservoir. After bubbling for the past eight hours, here are tonight's numbers prior to lights out: PH: 5.7 PPM: 380 EC: .8 Water level: Down, ~1 quart It will be interesting to see how much more the PH drops overnight. At this point, I'm wondering if I just have a bad batch of nutrients because what I have right now are not working. Assuming the PH drops more overnight, I'm going to try switching nutrients to AN PH-Perfect Connosoir Bloom, parts A & B.