Cassandra mentions this in her video so I checked it out.
Seems good to use when amending soil before using and when recycling the soil from the last grow to better know what amendments are needed to rebuild the soil.
How to use the kit
So for me anyway for $13 per grow to better be able to know what I’m starting with and maybe another $13 after amending to know where I ended up to verify my mix is $3-4 per plant for an 8 plant grow. If you make a larger batch for the next grow at the same time then costs per plant are lower and the soil will store until needed.
Just another option to add to your tool belt
Hope this helps and HAGD