I haven't been on here for years, so forgive in advance for asking stupid questions. Please?
Anywho, years of nearly flawless results have come to an end as this new, vexing phenomenon is taking place.
The top quarter inch of the pf cakes are not colonizing, while the bottom 80% are super strong, even fruiting. simple as that.
What's going on?
Elevation? poor gas exchange? cursed by an ex?
Should the uncolonized end be cut off? Should they be chambered, as is?
Any info, or links would be appreciated.
ps photo is uncolonized substrate, not just barrier verm.