I have used super roots plastic airpots and smart pots, love em both. I have wanted to try that blumat system, thats for auto watering right? If you get a chance please let us know how that turns out for you
I'm not sure if it's the Calcium or Magnesium but when I get purple on the stems I add some ca mg at 5mls per gallon. If I am out I use some aged tap (city) water.
High McLoadie happy to make my 1st post on your thread