I read a post you made last year. Im quoting you below. I also use ro water and i have been consistantly having issues with seeds starting, ez cloner, and vegatative growth. My ro water comes out 0-20ppm and 8.6 ph. What you saying makes perfect sense except You say absolutely supplement with calmag. approx 200ppm. then you say start "Just start low, like 50ppm calmag, 100ppm base nutrient(so 150ppm)