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how often should you replace pool filter cartridges


Author: Poolking - Swimming Pool Equipment Manufacturer

Pool filters are an essential part of keeping your swimming pool clean and safe. They help to remove debris, dirt, and other impurities from the water, ensuring that your pool is clear and free of harmful bacteria. However, like any other appliance, pool filters require regular maintenance and replacement to keep working efficiently. So, how often should you replace pool filter cartridges? Let's find out.

What is a pool filter cartridge?

A pool filter cartridge is made of porous material and is designed to trap dirt, debris, and other impurities from the swimming pool water. The cartridge can be easily removed and replaced, making it an easy and practical option for pool maintenance.

Why is it essential to replace pool filter cartridges?

Over time, pool filter cartridges become clogged with dirt, debris, and other impurities. This buildup can make it more difficult for water to flow through the cartridge, resulting in reduced filtration capacity. A clogged pool filter can also put a strain on your pool pump, causing it to work harder and potentially reducing its lifespan.

When should you replace pool filter cartridges?

Here are some things to keep in mind when determining when to replace your pool filter cartridges:

1. Manufacturer's recommendations: Check the manufacturer's recommendations for your pool filter cartridge. They typically provide guidelines for how often to replace your filter cartridge.

2. Amount of use: The more you use your pool, the more debris and dirt it will collect, and you will have to replace the filter cartridge more often.

3. Type of pool: Saltwater pools may require more frequent filter replacements compared to traditional chlorine-treated swimming pools.

4. Water quality: If your pool is near potentially harmful debris such as leaves or if your pool is located near a construction site, you may have to replace your cartridge more frequently.

5. Season: If you are using your pool more often during the summer months or in regions with year-round warm weather, you may have to change your cartridge more often.

How often should you replace pool filter cartridges?

The answer depends on a few factors. However, as a general rule, pool filter cartridges should be replaced every 12-24 months. With that said, check the manufacturer's recommendations for your specific model and pool size.

Signs your pool filter cartridge needs to be replaced

Here are some signs that it's time to replace your pool filter cartridge:

1. Reduced water flow: If you notice a reduction in water flow, it may be a sign that your filter cartridge is clogged and needs to be replaced.

2. Dirty pool water: If your pool water looks dirty or cloudy, it may be a sign that your filter cartridge isn't working correctly.

3. Increased pressure on the pool pump: If your pool pump is under more strain than usual, it may be a sign that your pool filter cartridge is clogged.

4. Visible wear and tear: If you notice any visible signs of wear and tear on your pool filter cartridge, such as holes or tears, it's time to replace it.

5. Unpleasant odor: If there's an unpleasant odor coming from your pool water, it could be a sign that your filter cartridge is past its usage timeframe.


Pool filter cartridges are a vital component to ensure that your swimming pool is clean and safe to use. Keeping the filter cartridge clean and changing it regularly can help keep your pool in excellent condition, avoid costly repairs, and ensure that your pool water stays sparkling clean. Follow the manufacturer's instructions for changing the pool filter cartridge or have a professional pool service technician assist you. Remember: it's much better to err on the side of caution and replace the cartridge more frequently, rather than waiting too long and risking damage to your pool filter or pump. Happy Swimming!


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