That isn't really casing Dank, it is some sort of sandwich that merely extends the bounds of the substrate, it seems more like spawning actually. casing is laying a thin (3/4 - 2 inche) layer of sparse, water absorbing, PH neutral to base coarse material on the top of a fully colonized substrate. I realize that many don't see the point, claiming that it is just one more delay, just one more proceedure, just one more expense and just one more invite to contamination. These are all true. My response however, is that the substrate is not damaged when picking, there is no dunking required - and - your pinsets will be more likely to be uniform and massive. Shaggy manes will fruit from straw alone but the addition of a casing makes all the difference.