I use RO and coco! sucking up the CalMg

when I first saw signs I adjusted my amount in the recipe and hit em with a foliar spraying or two. That seem to make them happy, but I have to remember the amount they use now is more. I think at some point if it would have to be saturated with enough ions? to stop using so much but if your using drain to waste it would just pass on out of it so have to keep the schedule high in CalMg.

Can someone confirm my thinking on this 

noticed also schedules that involve coco mixes are lower ppm, higher CalMg and don't taper this on or off on the schedule but encourage mixing a pH'd water with Cal Mg to bring EC into range.