Filter Media: What They Are and Why They Are Key in Water Treatment

The filter media are the materials that are placed inside a filter to retain impurities and improve water quality. Thanks to them, the water passes through different layers that eliminate sediments, particles and microorganisms, guaranteeing a cleaner, clearer and safer result for use.

What is a filter medium?

A filter medium is the material used within a filter to purify water. It can be made of silica sand, recycled glass, zeolite, activated carbon or even synthetic materials, depending on the type of application. Each medium has different properties that influence filtration efficiency, durability and maintenance.

Types of filter media

There are differenttypes of filter media depending on the level of purity sought or the type of installation:

Silica sand: the traditional, economical and effective option for retaining large particles.
Filter glass: made with recycled glass, more durable, ecological and with better performance.
Zeolite: natural mineral with a high capacity to absorb and eliminate ammonium.
Activated carbon: ideal for removing chlorine, odors and organic compounds.
Synthetic or high-precision media: used in industrial processes or specific applications.

What is the best filter media for water treatment?

Filter glassis today the most efficient, sustainable and cost-effective medium for most water treatments, especially in swimming pools and domestic or industrial systems. Among the most popular brands are Eco Pool and Inffinitty.

Silica sand is ideal for traditional filtration systems, is economical, but requires more frequent changes and consumes more water. A fairly common brand of silica sand is Eco Pool.

Zeoliteis more recommended for water with a high content of ammonium or heavy metals, it is widely used in industrial treatment or large aquariums.

And activated carbon serves as a complement to physical filtration, in water treatment plants or water purification systems, since it eliminates chlorine, odors, pesticides or organic compounds.

Industrial filter media

In the industrial sector, industrial filter media are used to treat large volumes of water in manufacturing, cooling or purification processes. They allow the performance of installations to be optimized, resources to be saved and environmental regulations to be complied with.

Filter media for water treatment are applied in water treatment plants, urban treatment plants or reuse systems. Its mission is to eliminate physical and chemical contaminants before returning the water to the environment or reusing it in other processes.

Are these filter media used for desalination?

No. Filter media such as sand or glass are designed to retain impurities and solid particles, but they do not remove salt from water. Desalination requires specific technologies such as reverse osmosis or distillation, which separate salt molecules from water by pressure or evaporation. However, in the water desalination process, filter media such as glass or silica sand are used in the primary phase.