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How to Clean a Hot Tub Filter

  |   Hot Tub Maintenance   |   8 Comments

Soaking in a hot tub is a great way to relax, and your hot tub filter plays a big role in keeping the water clean so you can relax in a healthy hot tub. Your hot tub filter works a bit like the air filter in your car, trapping particles and contaminants as they pass over the filter’s fibrous fabric. Over time, the accumulated dirt and debris clogs the filter so it can’t work as well anymore. How often you clean your hot tub filter depends on the climate and how often you use your hot tub, but we recommend cleaning your hot tub filter every three to six weeks.



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There are two basic ways to clean a hot tub filter: 1) a quick clean and 2) a deep clean. For both methods, pull out any loose debris from the filter. For a quick clean, rinse your filter with a garden hose. For a deep clean, soak your filter in a hot tub filter cleaner overnight and then rinse thoroughly with water.


The Best Way to Clean a Hot Tub Filter


Step 1: Remove the Filter


Turn off the hot tub. It’s important that your hot tub pump is not running while you’re cleaning the filter. Using the control pad, turn off the spa or put the spa in “hold” mode.
Remove the filter from the hot tub. If you’re not sure where your hot tub filter is, consult the hot tub’s user manual. In most hot tubs, the filter is partially visible and housed in a cradle or a bucket (this can be removed with a screwdriver). Remove the filter cap, filter plate, and filter cartridges.


Step 2: Clean the Filter

Quick Clean: Give your hot tub filter a quick clean.

    1. Pull out any loose debris from the filter.


  1. Rinse the hot tub filter with a garden hose. Make sure you clean between the pleats on the filter and rinse out every speck of dirt.
  2. (Optional) If your filter is particularly dirty, you can spray your filter with a hot tub cleaner. After spraying the filter with cleaner, let it sit for a few minutes and then rinse it clean with your hose.

Deep Clean: Give the filter a more thorough cleaning.

    1. Pull out any loose debris from the filter.


    1. Soak the hot tub filter in a filter cleaning agent.


  1. Let the hot tub filter soak in the cleaning agent overnight.
  2. Remove the filter from the cleaning agent and rinse it thoroughly using your garden hose. You can get a cleaning agent from your local spa dealer.


Note: Most hot tub filter manufacturers recommend not using any DIY methods such as running it through the dishwasher or using any home products to clean your hot tub filter as these tactics can damage the filter.


Step 3: Reinstall the Hot Tub Filter


Put the hot tub filter into the housing area. Secure the hot tub filter in the housing unit. For more information about your particular unit, consult your hot tub user manual.


Final Tips on Cleaning Your Hot Tub Filter


    1. How often you clean your hot tub filter depends on the climate and how often you use your hot tub. For example, if you live in a warmer climate and use your hot tub frequently, you definitely want to clean your hot tub filter more often. We recommend cleaning your hot tub filter every three to six weeks.


    1. Cleaning your hot tub filter on a regular basis certainly keeps it functional for longer, but it’s important to replace your hot tub filter every one or two years (depending on the brand).


  1. Do not use a brush on the fibrous material of your hot tub filter as the brush could damage the filter and render it less effective.
  2. There are DIY resources online that suggest different ways to clean your hot tub, but these are not approved or recommended by Bullfrog Spas or filter manufacturers. Any home product or DIY solution may end up harming the filter or your hot tub. Any damage to the spa due to a DIY solution could end up voiding the warranty.


Your hot tub filter works hard to keep your hot tub clean and your spa experience refreshing and relaxing. To ensure that hot tub use continues to be a boon to your health and well-being, make sure you’re keeping your hot tub filter clean.


At Bullfrog Spas, we don’t just know the best way to clean a hot tub filter, we also know how to keep your hot tub in the best shape.


Check out our Expert Hot Tub Maintenance Guide for tips, videos, and step-by-step guides for all your hot tub maintenance needs.

Hot Tub Maintenance Guide


AUTHOR - Bullfrog Spas

Bullfrog Spas is a premier brand of personalized premium hot tubs. With proprietary hydromassage technology and an eye for contemporary design, Bullfrog Spas is revolutionizing the concept of the portable hot tub and providing a relaxation experience unlike any other. Discover the award winning spa of the future today.

  • gene nelson | Feb 18, 2019 at 9:07 am

    can you explain the status codes on the A7 series. does it show trouble or just status

  • Randy McAlpin | Jun 2, 2019 at 2:15 pm


    Get signs of alge from jets, filters clean. Not sure what to do. Also rubber head rest faded extremely bad, ant suggestions

    • Bullfrog Spas | Jun 3, 2019 at 9:23 am

      It sounds like your sanitizer is potentially not being effective. Chlorine is more effective against algae than bromine or other sanitizers like ozone or hydrogen peroxide. You may try adjusting your sanitizer type or regimen to ensure better performance. Check with your Authorized Dealer for their suggestions in your area for your water type.

  • Bill Cookson | Nov 23, 2019 at 5:46 am

    I have a 682 spa purchased in 2005, the spa has not had water in it for the last five years. The jet packs have a thin coating on the back side that looks like it may come loose when it is hydrated. Is there a product that will remove this film?

    • Lance Hansen | Nov 25, 2019 at 10:07 am

      Great question. There are 3 great solutions to help you get rid of that film.
      You could use:

      Glass cleaner
      Magic eraser

      Enjoy the spa!

  • Tim Barnes | May 23, 2020 at 7:36 am

    How do you clean under the cup holder lights with out removing the lights? There is some buildup of black mold.

    • Lance Hansen | May 26, 2020 at 7:51 pm

      Tim great great question! If you remove the side panel you can undo the nut holding the cupholder down. That gives you the opportunity to raise it a little and clean underneath.

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