There are 2 types of pool filter: Sand Filters & Cartridge Filters.

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PSM can give some very simple advise. If you are looking for ultimate relaxation a cartridge filter is not for you. PSM pools are all in-ground swimming pools and the levels of filtration & maintenance we expect you to enjoy from a PSM pool will not be reached using a cartridge filter.

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Therefore, PSM recommends the installation of a sand filter. Sand filters will remove far more dirt & debris from your pool and will require much less regular maintenance. Sand filters are filled with sand or glass filter media and your pool pump forces pool water through this media which removes dirt before entering back into your pool. Sand filters need to be cleaned by a process known as backwashing where the media is agitated and dirt lifts out of the media and can be flushed through to waste. Backwashing times vary but it is a good idea to get into a regular cycle of backwashing at least every 2 to 6 weeks.

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As well as sand you can also use glass filter media. Glass improves the speed and efficiency of backwashing meaning less water loss and needs to be changed less regularly. If you do not maintain a strict backwashing routine sand can harden and cause “channelling”. Water always chooses the path of least resistance so if the sand forms channels the water passes through a dramatically reduces the amount of filtration taking place which is why sand needs to be changed annually. Glass is less prone to channelling and therefore needs changing less frequently.

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Filters are often also combined with a pump on its own tray which is known as a filter set.