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Pool filters can be found in three different types: sand; cartridge; and Diatomaceous Earth (DE). The very best swimming pool filter by far may be the diatomaceous earth filter. It is black powder made from the exoskeletons of animals that were buried and fossilized over a million years back.DE filters have the ability to filter particles from five to three microns in size. They do not have to be replaced like cartridges or sand. These filters run at high pressures and you also need to make sure your pump are designed for the pressure. Like sand filters, DE filters also need to be backwashed when the pressure rises six pounds above the normal operating pressure. Running at such high pressures can cause flow loss and inefficiency.These filters work by passing clean water through openings that appear to be little sponges. The particles are trapped as they pass through the filter. These internal elements are coated with the diatomaceous earth, creating a filter cake that catches from dust, algae, dirt, plus some bacteria.When you backwash a DE filter, it is advisable to recoat the filter grids. That is done by feeding it through the simmer and allowing it to get pumped in to the filter tank. Pool owners should clean their filters about twice a year by firmly taking them apart and cleaning the grids. Schwimmbecken of the filters currently in the marketplace feature durable injection moulded tanks. They are made of tough abrasion resistant materials with a v-grid design that provides an even flow when it is working and also when its backwashing. An excellent DE filter could have a one-piece cover with valves and pressure gauges, outlet hoses, and tank drain plugs.One of the better manufacturer's for DE filters is Jandy. These filters have easy-grip handles on the tank that makes it easy to clean. It has a pressure gauge/air release valve that comes equipped with an indicator that lets you know when the filter has to be backwashed and clean. They make models that may handle forty-eight and sixty square foot capacities. It has an internal air relief and the tank is made of UV and corrosion-resistant thermoplastic.