kp solves it with her usual benevolent wisdom thank god. Mister E, just guessing but I think your problems probably were related to your old water. RO water plus your CalMag is the way to go. I found that once I did do things according to the way I was directed that everything fell into place beautifully. Every single time I have run into trouble it is because I'm "improving" or changing something (usually trying to get by with....)and not following the directions. This is one of the biggest things I love about hydro as opposed to growing outdoors (I have not tried soil indoors); when I do things EXACTLY the way I was told my plants will grow EXACTLY the way the way I was promised they would. My last harvest (done last week) was 2 and 1/4 oz manicured bud per plant which is plenty for me.