Sand or glass? Discover the ideal option for your pool filter

When it comes to keeping pool water crystal clear and free of impurities, the type of filter media used in the filter is fundamental. Traditionally, sand has been the most common material, but recently filter glass has been gaining more prominence among professionals in the field. But why should we opt for glass instead of sand? Let's explore the benefits this switch will bring us.

1. Better filtration capacity
Filter glass is more efficient than sand at removing small particles from water, resulting in cleaner, clearer water.

2. Less biofilm formation
One of the major problems with sand filters is the formation of biofilm - a layer of micro-organisms that develops on the surface of the sand. Glass, on the other hand, is less prone to biofilm formation because it has a smoother, non-porous surface. This reduces the need for chemical treatments to eliminate these micro-organisms and consequently reduces the use of chlorine and other disinfectant products.

3. Water and energy savings
Filter glass requires less backwashing compared to sand. Backwashing is the process of cleaning the filter, which usually consumes a significant amount of water. With glass, the need for backwashing is reduced by up to 50 per cent. This saves water and reduces operating costs. What's more, with fewer blockages and a more efficient flow, the filter system consumes less energy.

4. Greater durability
Over time, sand tends to become more degraded and compacted, thus reducing its filtering efficiency. This is not the case with glass, which retains its shape and effectiveness over the years. In fact, filter glass can last up to 3 times longer than sand, which means fewer changes and less maintenance.

5. Sustainability
Filter glass is usually made from recycled glass, which makes it a more sustainable option than sand. As well as contributing to recycling and reducing waste, glass helps minimise the environmental impact of swimming pools. There is also reactivated glass which is made through a manufacturing process that contributes to better filtration, commonly referred to as AFM, which allows for greater efficiency in particle retention.

6. Long-term cost savings
Although filter glass may initially be more expensive than sand, the savings generated over time - whether through reduced water and energy consumption, or the reduced need for replacement and maintenance - make this option more economical in the long term.

It's important to note that glass takes up 15 per cent more volume than sand, so 15 per cent less glass is needed compared to sand, which brings further savings to the system.

Replacing sand with glass in pool filters offers more efficient filtration, as well as less maintenance and savings on resources. As well as improving water quality, glass is a more durable and sustainable option. If you're looking for a superior solution for your pool, filter glass is the way to go.