65 lt Monotub
Monotub used to spawn grain spawn to bulk substrate. It comes with the correct sized holes drilled and fulled with poly-fil for fresh air exchange.
This tote would fit around 3-4 l of grain spawn mixed with your bulk substrate at a ratio of 1 part grain spawn to 3 parts bulk substrate.
A common bulk substrate recipe is 2 parts coco choir : 1 part vermiculite : 1 part horse manure , this needs to be sterilized at between 65C – 75C for 90 minutes and let cool to room temperature before being mixed with your grain spawn.