Quick question on ppm.... We currently have 2 plants in aeroponic system. Currently in week 3 of veg. The first week our ph and ppm were perfect. The next 2 weeks the ppm is going up by approx 50 every day. We tried lowering the nutrients on the last water change and the ppm is still slowly rising. Plants look great, no signs of stress. Growing well and happy. I'm just worried that I'm just not seeing a problem. Any advice would be appreciated.