Recipe 420 does look like an interesting mix.
Anybody familiar with Sanctuary Soil and Feed potting soils? One of the local hydroponics stores here just started carrying some of their line. They have a new sea blend called
Victory Brand Superior Garden Mix. I haven't tried that yet, but I did buy
Empire Builder
I love the hydro stores, they get quality stuff that you would never find at big box stores or your average garden center around here.