Heavy metals and pollutants (e.g. from the water) are permanently linked.
The purely mineral-based plant substrate blocks fungi that can attack the roots. Therefore, PON is suited for people who suffer from allergies. It can also prevent bugs such as gnats, since they typically only nest in soil.
PON is free-flowing and can be used with a shovel to fill planters in place of dirt.
When planting with LECHUZA-PON, you don't need to completely free the root ball from the soil.