Like the title says I grow in soil But i figured this would be a good place for this question. In my room I have a water holding tank. I use a float valve to auto refill And of coarse a hose for delivering the water. It also has an air stone in it I have decided to use an ro filter Because I need to have very low ppm For what im doing and my current ism filter is not getting me there. My question is about cal mag. Is it possible to just continually add Calmag to that barrel to my desired ppm? Or does it fall out of solution if not used immediately. What I want to do is avoid individual doses of calmag and just readjust the source. Sounds to good to be true. Can I do it?