BuildASoil's heavier fully-amended living soil blend — denser nutrient load than the Light mix. Used in the 3.0 recycled quadrant of the 10x10.
Jeremy says the 3.0 was stacked with cover crop running through it when recycled, so it was even more fertile than start, and the Halitosis #4 in it yielded lighter partly because of that nutrient profile and partly because of genetics.