An important topic in pool planning is the right filter system, which makes a smooth pool operation possible and ensures that the water in the pool remains clean and clear. It filters out leaves, insects, dirt and much more out of the water and allows an unadulterated bathing pleasure. As the name suggests, the sand filter system is a system that draws the water from the pool and sends it under pressure through a layer of sand that is usually quartz sand and is in the filter tank. In the process, coarse contaminants are removed by getting caught in the filter sand and the water has already been cleaned to about 80 percent. This purified water is then returned to the pool from there. So the pump rolls over the water. Dirt residues that remained in the water and that the sand could not filter out, are then made by additives such as chlorine harmless. These additives are simply added to the water. Thus, the fact is that optimal water care with a sand filter system stands and falls. So that you can find the right and best filter system for your pool, Hammerkauf offers not only the various sand filter systems but also the necessary accessories as well as cleaning and care products in a wide range on several shop pages. For example, you will also find the sand that needs to be changed in the sand filter system. How often you should change this sand depends mainly on the degree of pollution and how often and how long it was used. To make sure that you always get the best filter performance, change the sand every two to three years. We wish you every success in choosing a sand filter system or a sand filter pump and a great summer!