Pool Filter Cleaners: What to Use and When

LayorCare Blogger • October 7, 2025

Maintaining a clean and healthy swimming pool is a top priority for any pool owner. Ensuring that your pool filter is functioning effectively is a crucial aspect of pool maintenance. Over time, filters can become clogged with debris, impacting their efficiency and the overall cleanliness of your pool. This is where pool filter cleaners come into play. In this article, we'll discuss the types of pool filter cleaners available, how to use them, and when it's the right time to do so.


Before diving into pool filter cleaners, it's important to understand the different types of pool filters. There are three main types: sand, cartridge, and diatomaceous earth (DE) filters. Each type has its own maintenance needs and cleaning requirements.

types of pool filter cleaners

Sand Filters

Sand filters are one of the most popular types of pool filters due to their simplicity and effectiveness. They use a bed of specially graded sand to trap particles as water flows through. The sand acts as a natural filtering agent, catching debris and particles, which prevents them from re-entering the pool. While they are easy to maintain, they require periodic backwashing to clean out the trapped debris. Over time, the sand can become compacted and less effective, necessitating the use of a pool filter cleaner to rejuvenate its filtering capability.


In addition to backwashing, sand filters may require a complete sand change every 3 to 5 years, depending on usage and water conditions. This is because the sand grains can become rounded and less effective at trapping particles. Using a specialized granular cleaner periodically can help extend the life of the sand by breaking down oils and other debris that accumulate in the filter media.

Cartridge Filters

Cartridge filters are known for their ease of use and high filtration capacity. They consist of a cylindrical cartridge made of pleated fabric that traps dirt and debris as water passes through. These filters need to be removed and hosed down regularly to maintain efficiency. The pleated design offers a large surface area for capturing particles, which makes them highly efficient.


When simple rinsing isn't enough to remove accumulated oils and minerals, a specialized pool filter cleaner may be required. Liquid cleaners are particularly effective for this purpose, as they can penetrate deep into the fabric to dissolve stubborn residues. It's also important to inspect the cartridge for any signs of wear or damage during cleaning, as a damaged cartridge can significantly reduce the effectiveness of your pool's filtration system.


In terms of maintenance, cartridge filters should be cleaned every 4-6 weeks, depending on pool usage and environmental conditions. It's also advisable to have a spare cartridge on hand, so you can swap them out during cleaning for minimal downtime.

DE Filters

DE filters use a fine powder made from fossilized algae called diatomaceous earth to coat grids inside the filter. This powder provides a very fine level of filtration, capable of trapping extremely small particles. DE filters are renowned for their superior filtration but are more complex to maintain than sand or cartridge filters.


Cleaning DE filters involves a multi-step process that includes backwashing to remove used DE powder and trapped debris. After backwashing, the grids must be removed, cleaned, and recoated with fresh DE powder. Liquid cleaners can be used to soak the grids, dissolving oils and minerals that regular cleaning might miss. This process ensures that the filter operates at peak efficiency.



In addition to regular maintenance, it's important to monitor the pressure gauge on a DE filter. An increase in pressure usually indicates that the filter is clogged and requires cleaning. DE filters should be backwashed monthly and recharged with DE powder to maintain optimal performance.

Types of Pool Filter Cleaners

Depending on the type of filter you have, there are various pool filter cleaners available on the market. Selecting the right one is crucial for maintaining your pool's health.

Liquid Cleaners

Liquid pool filter cleaners are a popular choice for cartridge and DE filters. These cleaners are typically used to soak the filter elements, dissolving oils, minerals, and other contaminants that can clog the fabric or grids. They are excellent for deep cleaning when regular rinsing is insufficient, helping to restore the filter's efficiency.


To use a liquid cleaner, the filter elements are usually removed from the housing and placed in a container filled with a cleaning solution. The soaking process allows the cleaner to penetrate the filter media, breaking down stubborn residues. After soaking, it's important to rinse the elements thoroughly to remove any remaining cleaner and debris before reinstalling them.


Liquid cleaners are available in various formulations, some of which are designed to be more environmentally friendly. When selecting a cleaner, consider the specific needs of your filter type and any manufacturer recommendations.

Granular Cleaners

Granular cleaners are commonly used for sand filters. These cleaners help break down oils, algae, and other debris that accumulate in the sand over time. They are typically added directly to the filter system and then flushed out through backwashing, which helps to rejuvenate the sand's filtering capacity.


The use of granular cleaners can extend the life of the sand, delaying the need for a complete sand change. They are particularly useful in dealing with heavy loads of organic material, such as during peak swimming season or in pools with high bather loads. Regular use of granular cleaners can help maintain optimal water clarity and filtration efficiency.



When using a granular cleaner, it's important to follow the manufacturer's instructions regarding the amount to use and the duration of the cleaning process. Overuse or incorrect application can lead to ineffective cleaning or even damage to the filter system.

Spray Cleaners

Spray cleaners are convenient for quick cleaning of cartridge filters. They come in spray bottles and are applied directly to the filter element, targeting surface oils and dirt. While they may not be as effective for deep cleaning as soaking with a liquid cleaner, they are ideal for interim cleanings.


Spray cleaners are easy to use and can be applied without removing the filter from the system, making them a time-saving option for busy pool owners. They work by loosening surface contaminants, which can then be rinsed away with a hose. This method is particularly useful for maintaining filter efficiency between more thorough cleanings.


When using a spray cleaner, it's important to ensure even coverage of the filter surface to achieve the best results. Some spray cleaners also include additional features, such as conditioners that help extend the life of the filter media.

When to Use Pool Filter Cleaners

Knowing when to use pool filter cleaners is key to keeping your pool in optimal condition. Here are some signs that it might be time to clean your filter:

Reduced Water Flow

If you notice a decrease in water flow from your pool jets, it could be a sign that your filter is clogged and needs cleaning. Reduced flow can affect water circulation and filtration, leading to cloudy water. Regular monitoring of water flow can help you catch this issue early.


A sudden drop in flow rate might also indicate a more severe clog or mechanical issue within the filter system. In such cases, a thorough inspection and cleaning of the filter elements are recommended. Keeping an eye on the flow rate can also help you gauge the effectiveness of your cleaning routine and adjust it as necessary.


Maintaining optimal water flow is crucial not only for filtration but also for the even distribution of chemicals, which helps maintain water balance and prevent algae growth.

Increased Filter Pressure

Most pool filters have a pressure gauge. If the pressure reading is higher than normal, it indicates that the filter is working harder than it should be. This is a clear sign that cleaning is necessary, as increased pressure can strain the system and reduce its lifespan.


High pressure can be caused by a variety of factors, including clogged filter media, excessive debris, or even a malfunctioning gauge. Regularly checking the pressure gauge and understanding the normal operating range for your filter type can help you identify when cleaning is needed. It's important to address high pressure promptly to prevent damage to the filter system.


In addition to cleaning, regular maintenance should include checking for leaks, ensuring proper water levels, and verifying that all components are functioning correctly. These practices can help maintain consistent pressure levels and prolong the life of your pool equipment.

Cloudy Water

Cloudy pool water is often a result of poor filtration. If your water remains murky despite regular chemical treatments, it might be time to clean your filter. Cloudy water can harbor bacteria and algae, making it essential to address the issue promptly.


There are several potential causes of cloudy water, including insufficient filtration, high bather loads, or chemical imbalances. Regular cleaning of the filter is a key component in resolving and preventing cloudiness. Additionally, ensuring that your pool's chemical levels are within recommended ranges can enhance filtration effectiveness.


If cleaning the filter does not resolve the cloudiness, consider consulting a pool professional to assess other potential issues, such as circulation problems or equipment malfunctions. Keeping the water clear not only enhances the pool's appearance but also ensures a safe swimming environment.

Regular Maintenance

Even if you don't notice any immediate issues, regular cleaning is an essential part of pool maintenance. As a rule of thumb, cartridge filters should be cleaned every 4-6 weeks, sand filters should be backwashed every 1-2 months, and DE filters should be backwashed monthly and recharged with DE powder.


Establishing a routine maintenance schedule can help prevent problems before they arise. It's also important to adjust your cleaning frequency based on factors such as pool usage, environmental conditions, and seasonal changes. For example, pools in areas with high pollen counts or heavy foliage may require more frequent cleaning.


Regular maintenance not only improves water quality but also extends the life of your pool equipment, reducing the need for costly repairs or replacements. By staying proactive, you can enjoy a clean and inviting pool all season long.

best pool filter cleaner

How to Use Pool Filter Cleaners

Cleaning Sand Filters

  1. Backwash the Filter: Begin by turning off the pump and setting the filter valve to backwash. This process reverses the flow of water through the filter, flushing out trapped debris. Turn the pump back on and let it run for 2-3 minutes or until the water in the sight glass is clear.
  2. Add Granular Cleaner: With the pump off, open the skimmer lid and add the recommended amount of granular cleaner into the skimmer basket. The cleaner will dissolve and be distributed through the sand, breaking down oils and debris.
  3. Rinse and Repeat: After allowing the cleaner to work for the specified time, set the valve to rinse and run the pump for a minute to clear any remaining cleaner. Finally, return the valve to the filter position and resume normal operation.

Cleaning Cartridge Filters

  1. Remove the Cartridge: Turn off the pump and carefully open the filter housing. Remove the cartridge, taking care not to damage the pleats or end caps.
  2. Rinse the Cartridge: Use a garden hose with a spray nozzle to thoroughly rinse the cartridge, removing any loose debris. Work from top to bottom, ensuring all areas are clean.
  3. Soak in Liquid Cleaner: Place the cartridge in a bucket with a mixture of water and liquid cleaner. Follow the product instructions for the correct ratio and soaking time, typically several hours.
  4. Rinse and Reinstall: After soaking, rinse the cartridge thoroughly to remove any remaining cleaner. Inspect for damage or wear before reinstalling it in the filter housing. Ensure the housing is securely closed before restarting the pump.

Cleaning DE Filters

  1. Backwash the Filter: Begin by turning off the pump and setting the filter valve to backwash. Allow it to run for a few minutes to remove used DE powder and debris.
  2. Remove Grids: Open the filter tank and carefully remove the grids. Handle them gently to avoid damage.
  3. Soak in Liquid Cleaner: Place the grids in a large container filled with a solution of water and liquid cleaner. This step helps dissolve oils, minerals, and any DE residue.
  4. Rinse and Reassemble: After soaking, rinse the grids thoroughly to remove all traces of cleaner. Reassemble the filter, ensuring all components are correctly aligned. Add fresh DE powder according to the manufacturer's instructions before resuming normal operation.

Conclusion

Regular cleaning and maintenance of your pool filter are essential for ensuring a clean and healthy swimming environment. With LayorCare Pool & Patio Protection, offering the best pool cleaning products on the market, you can easily maintain your pool’s clarity and hygiene all season long.


By understanding the types of pool filter cleaners available and knowing when and how to use them, you can keep your pool in top condition and extend the life of your filtration system. A well-maintained pool not only looks inviting but also provides a safer and more enjoyable swimming experience for everyone.


Consistent care and attention to your pool's filtration system will enhance your overall swimming experience and help you enjoy a crystal-clear pool year-round.


Contact LayorCare Pool & Patio Protection if you need any help choosing the right pool cleaning products or maintenance solutions—we’re here to help you keep your pool looking its best.

FAQs About Pool Filter Cleaners

  • What are pool filter cleaners used for?

    They remove dirt, oils, and minerals that build up in pool filters over time.

  • How often should I clean my pool filter?

    Generally every 4–6 weeks, or as recommended by the manufacturer.

  • Can I use regular soap to clean my pool filter?

    No. Only use products made for pool filters to avoid damaging materials.

  • What types of pool filter cleaners are available?

    There are cartridge, DE, and sand filter cleaners, each for specific systems.

  • When is the best time to clean a pool filter?

    Clean it when water flow decreases or after heavy pool use.

  • Can chemical filter cleaners harm my pool?

    Not if used correctly and rinsed thoroughly after cleaning.

  • Do filter cleaners help improve water clarity?

    Yes. A clean filter boosts circulation and keeps water crystal clear.

  • Can I extend my filter’s lifespan with proper cleaning?

    Yes. Regular use of the right cleaner helps your filter last longer.

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