Products needed for constructed wetlands

Constructed wetland is a system of natural purification of domestic, agricultural and sometimes industrial wastewater, which reproduces the principle of self-purification typical of aquatic environments and wetlands.
The process takes place through the use of pretreatments, to eliminate the particulate and coarser substances, of highly purifying aquatic plants (the most used for this purpose are called macrophytes) and of a substrate to which the plants are rooted.
These materials must be placed in a duly waterproofed tank, in order to avoid percolation in groundwater.
Below there is a list of materials necessary for the creation of this reservoir.