There are various kinds of water filter media to suit your needs such as silica sand, activated carbon, cation resin, anion resin, greensand plus, etc.
for silica sand filter media, we are available in several sizes such as 10/14 mesh and 14/20 mesh
for gravel as a support for filter media available sizes 10-20 mm, 5-7 mm, 3-5 mm also 6/8 mesh
for carbon active there are several brands such as calgon ex USA jacobi ex Sweden, Gaia carbon ex Malaysia, also green carbon ex Indonesia,
for Iron removal available brands plus Greensand ex USA and Birm ex USA
For Cation Resin our products are available such as tulsion. purolite, resinek, Daion, etc.