how often should you change your above ground pool filter


Author: Poolking - Swimming Pool Equipment Manufacturer

How Often Should You Change Your Above Ground Pool Filter?

When it comes to maintaining your above ground pool, keeping the filter system in good working condition is essential. The filter removes contaminants and debris from the pool water, helping to keep it clean and clear. But, how often should you change your above ground pool filter? Here, we’ll explore this question and provide you with some tips and insights to help keep your pool in top condition.

Understanding Pool Filters

Before we dive into the topic of filter replacement, it’s helpful to understand a bit more about pool filters. There are three main types of pool filters: sand, cartridge, and DE (diatomaceous earth) filters. Each works differently but has the same basic function - to filter out debris and contaminants from the pool water.

Sand Filters

Sand filters use a special type of sand to trap particles and debris. They are simple to use and can be quite effective at filtering water. However, the sand itself will eventually become saturated with debris and will need to be replaced.

Cartridge Filters

Cartridge filters work by trapping debris on a porous material. They are popular for above ground pools, as they are easy to maintain and do not require backwashing. However, they do need to be cleaned and eventually replaced.

DE Filters

DE filters use a fine, powdery substance called diatomaceous earth to trap particles and debris. They are highly effective at cleaning water, but they require regular maintenance and can be more expensive than other types of filters.

Determining When to Replace Your Filter

So, how do you know when it’s time to replace your filter? Unfortunately, there is no hard and fast rule when it comes to filter replacement. The frequency at which your filter needs to be changed will depend on a few different factors.

Pool Usage

One of the main factors that affects filter lifespan is pool usage. The more you use your pool, the more debris and contaminants it will accumulate. If you use your pool frequently, you may need to replace your filter more often.

Water Quality

The quality of your pool water can also impact how long your filter lasts. If your water is highly contaminated or has a lot of debris, your filter will have to work harder and will become clogged more quickly.

Filter Type

As we mentioned earlier, the type of filter you have will also affect filter lifespan. Sand filters typically last the longest, while cartridge and DE filters may need to be replaced more often.

Manufacturer Recommendations

Finally, it’s a good idea to consult your filter’s manufacturer recommendations for guidance on when to replace it. They may provide suggested replacement intervals based on filter type, pool usage, and water quality.

Tips for Maintaining Your Filter

While there is no set timeline for filter replacement, there are a few steps you can take to help extend your filter’s lifespan.

Clean Your Filter Regularly

One of the most important things you can do to maintain your filter is to clean it regularly. For sand filters, this means backwashing the filter regularly to remove debris. Cartridge filters can be hosed down periodically to remove debris, and DE filters will need to be backwashed and recharged with new DE powder.

Monitor Water Chemistry

Taking care of your pool’s water chemistry is also key to extending filter lifespan. Keeping the pH and chlorine levels within the recommended range can help reduce the workload on your filter.

Use a Skimmer or Net

Using a skimmer or net to remove debris from the pool surface can also help reduce the strain on your filter.


In summary, how often you should change your above ground pool filter depends on several factors, including pool usage, water quality, filter type, and manufacturer recommendations. Regular maintenance, monitoring water chemistry, and using a skimmer or net can all help extend your filter’s lifespan. By taking these steps, you can keep your pool clean and clear, so you can enjoy many summers of fun in the sun.


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