PON is a uniquely designed grow media that contains balanced amendments that keep plants healthy and flourishing.  
The unique blend of ingredients are effective and don’t break down like normal soil.  You can use it over and over for YEARS (a decade or more)  so it’s a worth while investment.  
It’s also very aesthetically pleasing to look at in a pot with its rich earthy tones of green, white and black. 
What’s in it?
1. pumice- aeration and helps anchor the roots 
2. zeolite-  removes unhealthy bacteria 
3. Scoria- porous rock that improves aeration 
4. diatomite- improves cation exchange and prevents pests
5.  Expanded clay- lightweight and porous for loosening the substrate and improving oxygen flow and drainage 
In order to use this substrate it’s important to have plants potted in a self watering pot to prevent overwatering or roots sitting directly in water.