Hi Trew,Cheers! I've always wanted to apply this to cannabis from my horticulture experience in dry places. Learned it in the desert in the middle east where it was born. Don't mind if I pull up a chair as I'm new to this plant in that respect? (lifetime utilizer, however).
Newb here with input, but experience trumps all. Would rather admit I don't know and why rather than misinform you:
What's your water pH level at though?