clean meds

It’s my first run around with a fairly large sized cannabis grow. I just started mixing my soil, after adding several different organic amendments. I understand some peoples grow mold, is it bad if mine doesn’t ? & when it’s cooking can I use just unfiltered hose water? Lastly I need to mix the...

Hello everyone, I have hard water here at my well site and take my plant water before the salt system for cleaning. Can I use just my water to water my beds or should I use an ro system or will my water be fine without it?