This TEK utilizes more substrate than the standard recipe to maximize your flush. With a 1:6 spawn-to-substrate ratio, you want to be extra certain that your spawn is clean/free from bacteria or mold, as the extra moisture in the substrate will promote aggressive contaminant blooms.
A note from CANNA:
The Canna Trichoderma myth:
"Trichoderma spp., or any other microbe for that matter, is not inherent in, added to, or cultured for the coco medium CANNA uses."
https://www.canna.ca/articles/story-canna-coco-renewable-growing-medium
There's no issue with Canna, whatsoever.