I bought the composted soil.
The info on bag says:
Density: 400G/L
Moisture: 22%
Organic matter: 45%
Nitrogen: 0.8
E.C: 1.2 DSM
Coco Peat, Washed sand, Perlite, organic stimulants, compost.
This was mixed with potting soil from another company.
I didn't think compost could be harmful, but...