Pool Care Pool Maintenance

How to Clean a Hot Tub Filter? – Complete Guide 2021

How to Clean a Hot Tub FilterA hot tub creates the best place to relax, enjoy, and have fun with your family and friends. For you to make sure the enjoyments lasts and the hot tub runs at its optimal, you need to keep it clean. Cleaning it more often must be your priority. When it comes to the hot tub filter, one of the spa parts, it requires thorough cleaning for healthy bathing.

How to Clean a Hot Tub Filter? Guide for 2020

Its hygiene has to be maintained to keep the water free of dirt, debris, and grime. My aim of preparing this guide is to help you understand how to clean a hot tub filter effectively. So let’s jump right in.

What are the benefits of cleaning a hot tub filter?

When you do a regular filter cleaning routine, you get numerous benefits like easy chemical maintenance, safe bathing, extended filter durability, and also save money.

When you have the filters clean, you get more accurate results when you test the water chemistry. Additionally, cleaner water will consume less sanitizer compared to dirty water.

Since the debris and dirt block a dirty filter, these reduce the water flow, which in return affects the effectiveness of the jets and pumps. So, you need to keep the hot tub filters clean for optimal spa functioning.

Additionally, a cleaner filter will catch dirt and debris better, thus helping remove bacteria that comes with the water entering the spa. That ensures you get a safe swimming spa for you, your friends and family.

Another benefit of keeping the filters clean is, it helps extend their service life. That, in return, saves you money of buying a new one sooner.

How often should you clean the hot tub filter?

How to Clean Your Hot Tub Filter the stepsYou have to check the filter(s) after every two weeks to see if there is grime need cleaning. You might want to rinse it with clean water. You can do this while the hot tub is running since it’s a quick task.

Next, you need to plan and rinse the filter(s) media every month. For you to do this, you need to turn off the spa so that the pump cannot run with no filter in place. Remove the hot tub filter from its compartment and rinse it thoroughly. Ensure all the visible large debris and any buildup dirt is gone. Use an old towel to dry it and put it back.

After every-month cleaning, you will need to remove the filters again after three months. During this time, you need to soak them in an ideal filter cleaning solution. I have discussed directions on this it the section of ‘how to clean a hot tub filter.’

Another time to clean the filter is yearly. Most of the hot tub filters need replacement after one year of service. Remove your old filter and replace it with a new one and give it the above cleaning routine for the best results.

Note: You do not necessarily have to wait for a year to replace the filters. If you notice the media is ripped off, bent or even imploded, that is a clear indication it needs replacement. Additionally, if you see the filter end caps are brittle, much discolored or cracked, that too is a sign it needs replacement.

How do you clean a hot tub filter?

As I mentioned above, a clean filter will save you money, ensure your hot tub water is clean and safe, and also extend the filters life span. And you know what, the steps on how to clean a hot tub filter are quite simple. You need three methods only to clean them.

What do you need to clean the filter?

You’ll need:

• A water source and a garden hose
• A clean bucket
• A Filter Cleaning Wand (which is optional for the Quick Rinse)
• A Filter Cleaner (required for the Chemical Rinse and Soak)

The three methods to use in cleaning the hot tub filters

Method #1. The Quick Rinse

I previously touched on this where I said it’s a weekly cleaning session. While performing this, you will need to remove the filter(s) and use the garden hose to give it a quick rinse. You can also use the sink tap for this. Spread the pleats as you rinse to get all the dirt, debris, and hair out. Once you’re done, allow the filter(s) to dry and put it back.

Method #2. The Chemical Rinse

The chemical rinse is a monthly cleaning routine. What you need is a bottle of hot tub filter cleaner, use the right dilution method, and put is inside a clean spray bottle. Next, spray down the filter(s) generously and allow it to sit for around 15 minutes. When the time is up, rinse it down using some clean water and remove all the cleaning agent remaining.

Method #3. The Chemical Soak

The next cleaning method is the chemical soak done in every 3-4 months. Since you need to change the hot tub water 3-4 months, this is the time for deep filter cleaning. You have to make sure you give the filter a though cleaning.

Here you need the right hot tub filter cleaning chemical and not household products. Dilute the compound according to its bottle directions and use the right amount of solution to submerge the filter fully. If you got some more room, you could soak more than one spa filter with the right amount of solution.

Allow the filter(s) to soak in the solution overnight or for 24 hours. Next morning/day, make sure you have rinsed the heck out of the filter(s) using clean water. Ensure no chemical remains since it can cause foaming in your hot tub. Dry the hot tub filters using an old towel and put it back in place.

Bonus: Tips on Hot Tub Filter Cleaning

The above are the methods to use, but you can still face some challenges. Here I have some additional tips on how you to ensure you keep your spa filters in the best condition.

1) Before replacing your filter, always inspect it

I recommend you take a closer look at the hot tub filter before you take it back after cleaning. That will help you ensure there are no traces of dirt and debris remaining. And most importantly check signs of wear and tear. Check for cracks and rips/tears. If found some then you need to remove it and replace with a new one.

2) Do not run your hot tub when the filter is out

Filter plays the role of removing dirt, grime, and debris from the water before circulation. When you remove the hot tub filter for cleaning the guard is removed. During this time, bacteria, debris, and dirt will go directly to the hot tub circulation system. That can cause damage to the heater, pump, and jets. So, take the measure of turning off the hot tub, whereas you clean the hot tub filter.

3) Clean your filter housing unit

Once you have removed the filters from the hot tub, remember to give the filter housing some cleaning too. The compartment can have some mold, mildew and other dirt particles.

4) Never use any household cleaning product

Yes, some household cleaning products work great at cleaning the kitchen or the bathroom. But they aren’t officially designed to clean a hot tub filter. The cleaners may reduce the filter’s life span by damaging the fibers. Additionally, if not removed properly, they can cause damage to the hot tub or become harmful to your skin.

5) Never use the dishwasher/washing machine

You might be thinking that the high temperatures in the dishwasher to be ideal for cleaning the hot tub filter. No, never at any circumstance use the dishwasher to clean your tub filter. The hot tub filter can damage your dishwasher or the dishwasher reduce the effectiveness of the hot tub filter.

That applies to the washing machine too. The banging against the machine drum can lead to damages on the filter medium or even crack the machine glass. Detergents used here can also cause severe damage to the hot tub filter.


One thing we can all agree on is, a clean hot tub is enjoyable. While there are other spa maintenance activities, hot tub filter cleaning should not be forgotten. Use the above steps to ensure your hot tub filter stays clean all season through. Good luck!

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About the author

Sharif Miah

Hi! I'm Sharif, the founder of Globo Pool® and I have been working in the pool & hot tub industry for the last few years. I love to share my experiences with people & hope you are enjoying my information and lessons!

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