This is a crushed rock aggregate, that helps raise CEC of soil.
Also helps keep nutrients in the root zone for plant uptake. Especially potassium which is important for flower and fruit growth.
Zeolite also acts as a ph buffer in living organic soils.
It is also a great platform for soil bacteria to live on and increases their activity in the soil.
This is used in our living soil mix, and is a great addition to living organic soil.