Usually refers to powder-like substances such as diatomaceous earth or volcanic ash used to coat a septum-type filter. Can also be used as an aid to sand filters.
Substance of low specific gravity which remains in suspension when mixed with the liquid to be filtered. It should be porous and must be chemically inert to the liquid being filtered. Increases filtering efficiency and maintains cake porosity.
A type of finely divided media usually diatomaceous earth, processed Perlite, or similar material used to coat a septum of diatomite type filter.
A polymer or other material added to improve the effectiveness of the filtration process.
A chemical compound added to the water or to the filter that allows the existing filter to become more efficient. Examples are alum, water clarifiers and D.E. (diatomaceous earth).
Chemical that enhances the effectiveness of the filter such as, alum, water clarifiers and D.E.
A device that removes undissolved or suspended particles from water by recirculating the water through a porous substance (a filter medium or element). The three types of filters used in pools and spas are sand, cartridge and D.E. (diatomaceous earth).
Any material (usually diatomaceous earth) that enhances the separation of solids from liquids in the filtration process.
A chemical compound added to the water, filter or skimmer that allows the existing filter to become more efficient. They are generally flocculants, coagulants and diatomaceous earth.
An agent (such as diatomite) that improves filtering effectiveness in some way, such as enhancing the retention of particles or increasing the permeability of the filter to water flow.
A powder added to a solution to be filtered that forms a porous bed to improve filtration.