How To Clean A Hot Tub Filter: Save Money and Keep the Water Clear

A hot tub filter needs weekly rinsing and a deep clean every two to four weeks to keep the water clear and protect the pump. You can clean it with vinegar, baking soda, OxiClean, or a commercial filter cleaner. Replace the filter every 12 to 24 months or sooner if the pleats look cracked, soft, or discolored.

Understanding The Filter

Knowing what kind of filter you have makes cleaning way easier. Most hot tubs use a cartridge filter, which looks like a pleated cylinder. It traps tiny debris down to about 5 to 20 microns, which is about the size of fine dust or skin oils. When those pleats get packed full, the water turns cloudy fast.

Here’s a quick way to figure out what you’re working with.

Cartridge filters
Most portable and inflatable hot tubs use these, especially brands like Intex, Bestway, Coleman, Jacuzzi, and Sundance. They slide out easily, they’re simple to rinse, and they last about 12 to 24 months with regular cleaning.

Sand filters
You’ll see these more on larger backyard spas or combo pool spa setups. They clean water by pushing it through a bed of sand. They’re durable but need backwashing, not soaking.

DE (Diatomaceous Earth) filters
These give the best filtration, catching particles as small as 2–5 microns, but they’re more work to clean and usually found on large, in-ground spa systems.

If you use an Intex, Bestway, or Coleman spa, you’re almost definitely using a Type S1 or Type VI cartridge filter, and these respond great to simple DIY cleaners like vinegar or baking soda.

Why Your Hot Tub Filter Matters

Your hot tub filter does most of the heavy lifting when it comes to keeping the water clear. It pulls out oils, skin cells, hair, lotions, and the tiny debris you don’t even notice. When the filter gets clogged, everything in the hot tub starts to struggle.

1. Reduced water flow
Once the pleats fill up, the pump has to work harder to move water through the system. That’s when you start seeing slow jets, weak bubbles, or even flow error codes like E02, FLO, FL1, or EO5. A dirty filter is behind most of those issues.

2. Cloudy or smelly water
About 60 percent of cloudy water problems come from a clogged filter. When it can’t trap fine particles anymore, the water turns dull or milky, and the sanitizer has to work overtime to keep up.

3. Higher energy bills
A dirty filter forces the heater to run longer just to hold temperature. That extra strain can increase energy use by 15 to 25 percent, which adds up fast if you use your hot tub a lot.

4. Risk of damage to the pump and heater
If the pump runs with restricted flow for too long, it can burn out. Replacing a pump can cost a few hundred dollars, so keeping the filter clean is one of the cheapest ways to protect your whole system.

Identifying Your Hot Tub Filter (Improved Version)

Figuring out the exact filter your hot tub uses helps you clean it the right way and know when it’s time to replace it. Most hot tubs use a cartridge-style filter, but the size and model vary by brand.

Here’s how to tell which one you have.

Common filter types by brand: Most portable and inflatable hot tubs use one of these:

• Intex uses the S1 cartridge
• Bestway and Coleman use the Type VI cartridge
• Jacuzzi, Sundance, and Hot Spring use larger pleated cartridges designed for premium spas

If you see a short, pleated cylinder that twists or slides out of a housing near the pump, that’s a cartridge filter. These last 12 to 24 months with regular cleaning.

Easy ways to identify your filter

• Check the model number printed on the end cap
• Look at the manual or inside the filter housing
• Measure the height, diameter, and inner hole size
• Search the hot tub brand plus “filter type”

This makes it much easier to buy the right replacement or follow the best cleaning method.

Signs your filter needs more than just cleaning: Even the best cleaning routine can’t fix a worn filter. Look for these:

• Pleats feel soft or mushy
• Ends are cracked or warped
• The filter stays gray or brown even after soaking
• The hot tub repeatedly shows flow errors

Once you spot those signs, it’s time to replace it rather than clean it again.

How to Clean a Hot Tub Filter Cartridge

Cleaning a hot tub filter cartridge is easier than most people expect. A quick rinse removes surface debris, and a good soak breaks down the oils and minerals trapped deep in the pleats. Once it’s fully dry, the filter works almost like new again.

Steps to Clean It

1. Turn off the hot tub and remove the filter.
2. Rinse it with a garden hose, moving between each pleat.
3. Soak it for a few hours in vinegar, baking soda, or a commercial cleaner.
4. Rinse everything out and let the filter dry completely.
5. Reinstall the filter once it feels firm and fully dry.

A clean cartridge improves water flow, keeps the heater working properly, and helps you avoid flow errors like FLO, E02, or FL1.

How Often Should You Clean Your Hot Tub Filter?

Most filters do best with a weekly rinse and a deeper soak every two to four weeks, but your setup might need more attention.

Regular cleaning keeps your energy costs lower, helps the water stay clear, and extends the life of the heater and pump.

Here’s a simple breakdown.

Light use (1 to 2 times a week)

• Quick rinse every 7 days
• Deep clean every 4 weeks
• Replace every 18 to 24 months

Regular use (3 to 4 times a week)

• Rinse every 5 to 7 days
• Deep clean every 3 weeks
• Replace every 12 to 18 months

Heavy use (daily or near daily)

• Rinse every 2 to 3 days
• Deep clean every 2 weeks
• Replace every 9 to 12 months

Vacation homes, rentals, or Airbnb
These tubs see sunscreen, oils, hair products, and higher bather loads. They need stricter care.

• Rinse after every guest turnover
• Deep clean every 2 weeks
• Keep at least one spare filter on standby

If the water turns cloudy quickly or your hot tub shows flow errors like E02, FLO, or FL1, it usually means the filter needs attention sooner than planned.

Traditional Cleaning Methods

A quick rinse and a proper soak are enough to remove most of the oils and debris that slow down water flow.

Quick version if you’re in a hurry

• Turn off the hot tub
• Remove the filter
• Rinse it well with a garden hose
• Soak it in a cleaner for a few hours
• Rinse again and let it dry completely
  This whole routine takes about 15 to 20 minutes of actual hands-on time.

A few safety notes

• Always turn the hot tub off before removing the filter
• Never use boiling or very hot water, it can warp the plastic
• Don’t use a high-pressure washer, it can rip the pleats
• Make sure the filter is fully dry before reinstalling it
  Dry pleats trap debris better and last longer.

Once you get comfortable with this routine, it becomes an easy part of your monthly maintenance and makes a huge difference in how clean and clear your water stays.

Step-by-Step Guide to Cleaning (Improved Version)

Cleaning your hot tub filter doesn’t take long, and once you’ve done it a couple of times, it becomes second nature. Here’s the simple routine most owners follow.

1. Turn off the hot tub and remove the filter
Always start with the power off so the pump isn’t pulling water while the filter is out. The filter usually sits inside a small compartment near the pump. Lift it straight up and set it aside. If it feels slimy or looks dark gray, it definitely needs a deep clean.

2. Rinse away loose debris
Grab a garden hose with a standard spray nozzle and rinse between the pleats from top to bottom. Rotate the filter as you go so you hit every angle. This alone removes most of the hair, leaves, and surface grime.

3. Soak the filter in a cleaner
Once the surface dirt is gone, the filter needs a good soak to break down oils and mineral buildup. You can use a commercial filter cleaner or a simple DIY mix like vinegar or baking soda. Let it sit for a few hours. This step restores water flow and helps the filter run like new.

4. Rinse everything out
After soaking, rinse the filter again to wash out any cleaner and loosened debris. Make sure you get between all the pleats. Any leftover cleaner can create foam in the water.

5. Let it dry completely
This part people often skip, but drying makes the filter more effective. When the pleats are dry, they catch debris better and last longer. If you rotate between two filters, you’ll always have a dry one ready.

Monthly Filter Care Schedule

Month	Routine Rinse	Deep Clean	Notes
January	✓		Cold weather and heavy soaking can clog filters faster
February	✓	✓	Good time for a deeper soak to remove oils
March	✓		Start of spring debris season
April	✓		Pollen can build up quickly in the pleats
May	✓	✓	Sunscreen season begins, filters load up faster
June	✓		Rinse more often if you use the tub daily
July	✓		Sunscreen + heat = faster filter clogging
August	✓	✓	Peak usage month, deep clean helps a lot
September	✓		Leaves and outdoor debris start dropping
October	✓		Good month to check for wear and tear
November	✓	✓	Pre-winter deep clean keeps water clearer
December	✓		Holiday hot tub use usually increases

When to adjust this schedule

• Daily use needs rinsing every 2 to 3 days
• Vacation homes or Airbnbs should deep clean every 2 weeks
• In areas with pollen or dust, weekly rinsing becomes important
• If the water turns cloudy fast, increase your deep cleaning to every 2 to 3 weeks

Don’t forget replacement timing: Even with perfect cleaning, most hot tub filters only last:

• 12 to 24 months for standard cartridge filters
• 9 to 12 months with heavy use
• 6 to 9 months in rental or Airbnb setups

Replacing the filter before it fails helps prevent heater strain, weak jets, and flow error codes like E02, FLO, and FL1.

Check out How To Choose The Right Hot Tub Filter.

DIY Cleaning Solutions

You can use everyday household items like vinegar, baking soda, or even dishwasher detergent to get the job done. Below are several DIY methods that are effective, easy to follow, and gentle on your filter.

How to Clean with Vinegar

Using vinegar is a great natural way to clean. It’s non-toxic, eco-friendly, and does an excellent job of breaking down calcium deposits and other mineral buildups.

Step-by-Step Instructions:

1. Remove the Filter: Start by turning off your hot tub and removing the filter from its housing.
2. Prepare the Solution: Mix one part white vinegar with one part water in a large bucket.
3. Soak the Filter: Submerge the filter in the vinegar solution and let it soak for 3-4 hours.
4. Rinse Thoroughly: After soaking, rinse the filter thoroughly with clean water to remove any remaining vinegar and debris.
5. Let It Dry: Allow the filter to air dry completely before reinstalling it.

Benefits of Using Vinegar:

• It’s a natural, non-toxic cleaner that’s safe for both your filter and the environment.
• Vinegar effectively dissolves mineral deposits, which can improve water flow and extend the life of your filter.

How to Clean a Hot Tub Filter with Baking Soda

Baking soda is another excellent household item that can be used to clean. It’s mildly abrasive, making it perfect for scrubbing off dirt and debris without damaging the filter material.

Benefits of Baking Soda for Filter Cleaning:

• A natural deodorizer and can help eliminate any odors trapped in the filter.
• It’s gentle on the filter, preventing wear and tear while still effectively cleaning it.

Step-by-Step Instructions:

1. Remove the Filter: Turn off your hot tub and carefully remove the filter.
2. Create a Paste: Mix it with a small amount of water to create a thick paste.
3. Scrub the Filter: Use a soft brush to apply the baking soda paste to the filter, gently scrubbing away dirt and grime.
4. Rinse Well: Rinse the filter thoroughly under running water to remove all the baking soda residue.
5. Dry the Filter: Let the filter air dry completely before putting it back in the hot tub. Check out baking soda in hot tub.

How to Clean a Hot Tub Filter with Dishwasher Detergent

Dishwasher detergent is designed to cut through grease and grime, making it a strong option for cleaning. This method is particularly useful for filters that haven’t been cleaned in a while and need a more thorough cleaning.

Advantages of Using Dishwasher Detergent:

• It’s highly effective at removing oils and lotions that can build up in the filter over time.
• Dishwasher detergent is readily available and easy to use.

Detailed Cleaning Process:

1. Remove the Filter: As always, start by turning off the hot tub and removing the filter.
2. Mix the Detergent Solution: Fill a large bucket with warm water and add a few tablespoons of liquid dishwasher detergent.
3. Soak the Filter: Submerge the filter in the solution and let it soak for 1-2 hours.
4. Rinse Thoroughly: After soaking, rinse the filter thoroughly under running water to remove all detergent.
5. Dry Completely: Allow the filter to air dry completely before reinstalling.

How to Clean with Bleach

Bleach is a powerful cleaner that can be used for deep cleaning, especially if it’s heavily soiled. However, it’s important to use bleach with caution to avoid damaging the filter or leaving harmful residues.

Pros and Cons of Using Bleach:

• Pros: Highly effective at killing bacteria and removing tough stains.
• Cons: Can be harsh on the filter material if used too frequently, and must be thoroughly rinsed out to avoid leaving any residue.

Safety Tips and Step-by-Step Guide:

1. Remove the Filter: Turn off the hot tub and take out the filter.
2. Prepare a Diluted Bleach Solution: Mix one part bleach with ten parts water in a large bucket.
3. Soak the Filter: Submerge the filter in the bleach solution and let it soak for about an hour.
4. Rinse Thoroughly: Rinse the filter very well under running water to ensure all bleach is removed.
5. Dry the Filter: Allow the filter to air dry completely before reinstalling.

How to Clean with OxiClean

OxiClean is a versatile cleaner known for its ability to tackle tough stains and deep clean various surfaces. It’s also effective for cleaning.

The Effectiveness of OxiClean for Deep Cleaning:

• OxiClean’s oxygen-based formula helps break down organic material and stains without using harsh chemicals.
• It’s a great option for a deep clean when your filter needs more than just a quick rinse.

Step-by-Step Process:

1. Remove the Filter: Turn off your hot tub and remove the filter.
2. Mix the OxiClean Solution: Dissolve OxiClean in warm water according to the package instructions.
3. Soak the Filter: Place the filter in the solution and let it soak for several hours, or overnight for best results.
4. Rinse Thoroughly: Rinse the filter thoroughly to remove all OxiClean residue.
5. Dry Completely: Let the filter air dry fully before reinstalling it in your hot tub.

Which DIY Method Should You Choose?

Cleaner	Strength	Best Use	Avoid When
Vinegar	Mild	Minerals, scale	Greasy filters
Baking Soda	Mild	Odors, light dirt	Oils and lotions
Dishwasher Detergent	Medium	Heavy oils	If thorough rinsing is hard
Bleach	Strong	Bacteria, stains	Old or fragile filters
OxiClean	Strong	Deep cleans	If you’re short on time

Check out Cleaning Inflatable Hot Tub Filters: Products & Methods

Tips for Regular Maintenance

Routine Cleaning Schedule

Monthly Cleaning:

• Remove the filter and rinse it with a garden hose to remove loose debris.
• Soak the filter in a cleaning solution appropriate for your filter type (e.g., vinegar, baking soda, dishwasher detergent) once a month.
• Rinse thoroughly and allow to dry completely before reinstalling.

Bi-Monthly Deep Cleaning:

• Perform a deep cleaning every two months using a more intensive method such as OxiClean or a diluted bleach solution.
• Inspect the filter for any signs of damage or wear during this deep cleaning process.

Data Table for Filter Maintenance Tips

Tip	Frequency
Rinse the filter with a garden hose	Monthly
Soak in vinegar solution	Monthly
Deep clean with OxiClean or bleach	Bi-monthly
Inspect for wear and tear	Every cleaning session
Balance water chemistry	Weekly
Skim and vacuum hot tub	Daily/Weekly

Inspection for Wear and Tear

• Check the filter regularly for tears, cracks, or other signs of damage that could compromise its effectiveness.
• Replace the filter if you notice significant wear. A damaged filter cannot properly clean your hot tub water.

Maintain Proper Water Chemistry

• Balance your hot tub water regularly to prevent excessive buildup on the filter.
• Use test strips to monitor pH, alkalinity, and sanitizer levels, adjusting as necessary to maintain optimal water chemistry.

Regularly Skim and Vacuum

• Skim the surface of your hot tub daily to remove leaves, bugs, and other debris that could clog the filter.
• Vacuum the bottom of the hot tub weekly to remove settled debris.

Use a Filter Cleaning Tool

• Invest in a filter cleaning tool, such as a wand or brush, to help you clean between the filter’s pleats more effectively.
• Utilize these tools during both routine and deep cleaning sessions to ensure thorough cleaning.

Monitor Hot Tub Usage

• Adjust your cleaning schedule based on how often you use your hot tub. More frequent use may require more frequent filter cleaning.
• Encourage users to rinse off before entering the hot tub to minimize the dirt, oils, and lotions entering the water and filter.

Protect Your Hot Tub

• Use a hot tub cover when the tub is not in use to keep out debris and reduce the workload on your filter.
• Ensure the cover is secure and in good condition to maximize its effectiveness.

Keep Spare Filters on the Hand

• Rotate between two filters to ensure you always have a clean filter ready. This allows one filter to be cleaned and dried thoroughly while the other is in use.
• Store spare filters in a clean, dry place to prevent contamination before use.

Check out Printable Cleaning Schedules: Hot Tub Resources

Regular maintenance enhances water quality and extends the lifespan of your hot tub components, saving you money and time in the long run.

Remember:

• Adhere to a consistent cleaning schedule.
• Inspect the filter for signs of wear and tear.
• Use appropriate cleaning agents and tools.
• Balance your hot tub water chemistry regularly.

Extra Maintenance Steps That Make a Big Difference

These quick habits keep your filter from wearing out early and help your hot tub stay clear with less work.

Check for Wear and Tear

Look over the filter each time you clean it. You want to spot early signs that it’s breaking down.

Check for

• Soft or mushy pleats
• Cracks around the end caps
• Torn or separating pleats
• Stains that don’t rinse out

If you see any of these, it’s time to replace the filter.

Keep Your Water Balanced

Balanced water keeps oils and minerals from sticking to the filter.

Aim for

• pH between 7.2 and 7.8
• Alkalinity between 80 and 120 ppm
• Chlorine or bromine in the proper range

Test once a week for the best results.

Skim and Vacuum the Hot Tub

The less debris floating around, the less your filter needs to catch.

• Skim the water every day or every few days
• Vacuum the bottom once a week
• Remove leaves and bugs before they sink

This keeps the filter from clogging too fast.

Use a Filter Cleaning Tool

A pleat wand or spray comb helps you rinse deep into the folds. It clears out trapped dirt quickly and keeps the filter working better.

These tools help most in dusty or high-pollen areas or when the hot tub gets heavy use.

Adjust Cleaning Based on Use

If you use the hot tub often, the filter loads up faster.

Clean more often if

• You soak daily
• Kids or guests use the tub
• You soak after workouts
• It’s sunscreen season
• You live in a high-pollen or dusty area

Rinse every two to three days in these situations.

Use a Hot Tub Cover

A snug cover keeps out leaves, insects, pollen, and cold air. It reduces strain on the filter and keeps the water cleaner.

Make sure your cover fits well, isn’t sagging, and has secure straps.

Keep a Spare Filter on Hand

Rotating between two filters makes maintenance easy. One filter can dry completely while the other is in use. Dry pleats trap debris better and last longer.

How to Clean a Hot Tub Filter Home Remedy

You don’t need a specialty cleaner to get your hot tub filter looking fresh again. A few simple home ingredients can break down oils, grime, and mineral buildup just as well as store-bought options. These remedies are safe for most cartridge filters and work great for routine cleaning.

Best Home Remedy Methods

Vinegar Soak

Vinegar is one of the easiest ways to dissolve calcium and scale.

1. Remove the filter and give it a quick rinse.
2. Mix equal parts white vinegar and warm water.
3. Submerge the filter for three to four hours.
4. Rinse thoroughly and let it dry fully.

This method works great in hard water areas.

Baking Soda Scrub

Baking soda is perfect when the filter smells musty or looks dusty.

1. Make a thick paste with baking soda and water.
2. Brush it gently into the pleats.
3. Rinse everything out.
4. Let the filter air dry.

This is a gentle option that won’t damage the pleats.

Dishwasher Detergent Soak

Dishwasher detergent cuts through sunscreen, oils, and lotions fast.

1. Fill a bucket with warm water.
2. Add two or three tablespoons of liquid dishwasher detergent.
3. Soak the filter for one to two hours.
4. Rinse well so no suds remain.
5. Dry completely before reinstalling.

Great for oily or heavily used tubs.

Quick Tip

Never mix vinegar and bleach.
Never use boiling water.
Never reinstall a wet filter.

Clean a Hot Tub Filter in a Washing Machine

The spinning, twisting, and high-pressure movement inside a washing machine can crack the plastic ends and tear the pleats even on a gentle cycle.

Can You Put a Hot Tub Filter in a Washing Machine?

You can, but you really shouldn’t. Washing machines aren’t designed for delicate pleated cartridges. Even a light cycle can weaken the fibers, bend the pleats, or break the glue that holds everything together. Once the structure is damaged, the filter can’t trap debris correctly and may cause cloudy water or flow errors.

Why It’s Not Recommended

• The spinning motion bends or collapses pleats
• Plastic end caps can crack or split
• Detergent residue can foam up in the hot tub
• High-speed water pressure loosens the filter’s bond
• A damaged filter can overload the pump or trigger flow warnings

Most manufacturers warn against using washing machines because the filter can fail early, even if it looks fine afterward.

Safer Alternatives That Work Better

Rinse Method
Use a garden hose to spray between the pleats. This clears most dirt and debris.

Vinegar or Baking Soda Soak
These natural cleaners break down minerals and light buildup without damaging the filter.

Dishwasher Detergent Soak
Great for oily filters from sunscreen, sweat, and lotions. Just be sure to rinse well.

OxiClean Soak
Perfect for deep cleaning when the filter hasn’t been cleaned in a while.

These options clean just as well as a washing machine would, but without the risk of tearing or warping the filter.

When a Filter Is Too Far Gone to Clean

If the pleats are soft, collapsed, or permanently gray even after soaking, the filter is done. Trying to wash or revive a worn-out filter only causes more problems. At that point, replacing it is cheaper than dealing with cloudy water or heater issues.

For more tips and detailed guides on hot tub maintenance, visit Hot Tub Patio, your ultimate source for relaxation and outdoor living insights.