I'm very new at growing my own medical Cannabis and I've tried to do plenty of research on the growing mediums people are using. I planned on starting with a basic potting soil and souping it up with additives but I have decided to go reasonable conservative this time around. I bought " Coast of Maine potting soil with peat moss, perlite, old dark bark, compost and seaweed " It's pretty light and airy but should I use some Echo Earth (coconut fiber ) for drainage still? I also know the peat moss has an affect on the PH would this be problematic since I'm using auto flowering.