The medium it is now ii is E.B Stone Organics - Edna's Best Potting Soil. Enhanced with a special blend of bat guano, worm castings, kelp meal and a bunch of other stuff. It's supposed to be one of the best. I added more perlite because I didn't see a whole lot in it. Before it was just a cheap potting soil from walmart (no added plant food or fertilizers like you get with miracle potting soil) Then I added sand and perlite to it. It seemed alright at the time but now I know better.

As far a the fish emulsion goes, how much per gallon? Do I go by the back of the bottle or is it different for cannabis (seems like everything is)