should pool filter be on while swimming


Author: PoolKing - Pool Sand Filter Manufacturers

Should Pool Filter Be on While Swimming?

Swimming is undoubtedly one of the most popular summertime activities for families and individuals alike. Who doesn’t love jumping into a refreshing pool on a hot day? However, pool maintenance is essential to maintain safe and healthy swimming conditions for all. One common question that arises in the pool maintenance discussion is whether the pool filter should be on all the time while swimming. In this article, we will explore this topic in depth and provide all the necessary information you need to make an informed decision about your pool filter.

What is a Pool Filter and What Does It Do?

Before we delve into the main question, it's important to understand what a pool filter is and what its primary purpose is. A pool filter is an essential part of any swimming pool's water circulation and filtration system. The filter's primary function is to remove impurities and debris from the water, including dirt, leaves, small rocks, and other materials that may enter the pool. Without a filter, your pool water may become murky, cloudy, and potentially hazardous to swim in. Therefore, a properly functioning pool filter is crucial to maintain clean, healthy water for swimming.

Should the Pool Filter Be on All the Time While Swimming?

Now that we understand the role of the pool filter let's address the main question. Should the pool filter be on all the time while swimming? The answer is no, but it depends on the type of pool filter you have. There are two main types of pool filters: sand filters and cartridge filters.

Sand Filters

Sand filters are the most common type of pool filter used in residential settings. They work by pumping water through a bed of sand, where particles and debris are trapped. Sand filters should be run for a minimum of eight hours a day during peak swimming season to ensure that the water remains clean and clear. The good news is that you don't need to leave the filter on while swimming if you have a sand filter. Once you've run the filter for the recommended eight hours, you can turn it off while you swim. Then, you can turn it back on after your swimming session.

Cartridge Filters

Cartridge filters work similarly to sand filters, but instead of sand, they use a replaceable filter cartridge that traps debris and impurities. Unlike sand filters, cartridge filters require less maintenance and only need to be cleaned or replaced every few months. When it comes to swimming with a cartridge filter, you should leave it on for the duration of your swim. Since cartridge filters do not require as much maintenance, you can leave them on without worrying about any additional wear and tear.

Benefits of Keeping the Pool Filter on While Swimming

While it's not necessary to keep your pool filter on while swimming, there are some benefits to doing so. Firstly, running your pool filter while swimming helps to increase the water's circulation and filtration, resulting in cleaner and clearer water. Additionally, keeping the filter on can help prevent the buildup of algae and bacteria during periods of high usage. Finally, if you have a pool heater, leaving the filter on during swimming sessions can help distribute the heat evenly throughout the water, resulting in a more comfortable and enjoyable swim.


In conclusion, it's not necessary to keep your pool filter on all the time while swimming. Whether you have a sand or cartridge filter, you can turn it off while you swim without worrying about any negative consequences. However, there are some benefits to keeping the filter on, including cleaner and clearer water, less bacteria buildup, and even heat distribution if applicable. Ultimately, the decision comes down to personal preference and the type of filter you have.


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