rolling_stoned

@MeaCulpa, 2.8 sounds about right. The flower nutrient mix ranges from 1400 to 1600, and I run a pH between 5.9 and 6.1. Once in flower, I don't change the water; I top up the reservoir. I have a few 35-ltr mixing buckets, and I will adjust them according to the reservoir's pH and TDS. When I started DWC, I changed the nutrient mix every week, which became expensive, only to be told not to bother if I used CANNA Aqua. Good luck with your grow; I see you also have a mix pack on the go.