Your hot tub is all about relaxation, but behind the bubbles, your filter is doing the real work. Hot tub filters trap dirt, oils, hair, and debris so your water stays clean and safe. When filters get clogged, everything suffers. This includes water quality, circulation, heating efficiency, and even the lifespan of your spa.
The good news? Cleaning hot tub filters is easy, inexpensive, and doesn’t take much time. Here’s a complete guide to keeping your filters in top shape.
Why Cleaning Your Hot Tub Filter Is So Important
A dirty filter forces your hot tub to work harder than it should. That can lead to:
- Cloudy or foamy water
- Weak jets or poor circulation
- Longer heating times
- Increased chemical use
- Strain on the pump and heater
Regular filter cleaning keeps your water sparkling and helps prevent costly repairs down the line.
How Often Should You Clean Hot Tub Filters?
As a general rule:
- Rinse filters weekly (or every 1–2 weeks for light use)
- Deep clean monthly
- Replace filters every 12–18 months, depending on usage and care
If you use your hot tub frequently, have multiple users, or soak with lotions or oils, you may need to clean them more often.
What You’ll Need
Before you start, gather these simple supplies:
- Garden hose with a spray nozzle
- Filter cleaner
- Bucket or large container
- Soft brush (optional)
- Clean towels
Avoid pressure washers, they can damage the filter material.
Step-by-Step: How to Clean Hot Tub Filters
1. Turn Off the Hot Tub
Always power down your hot tub before removing the filter. This protects the pump and keeps you safe.
2. Remove the Filter
Most filters twist or lift out easily from the filter compartment. Take note of how it’s positioned so reinstalling is simple.
3. Rinse Off Loose Debris
Using a garden hose, spray between the pleats from top to bottom. Rotate the filter as you go to remove hair, dirt, and buildup.
4. Soak the Filter (Deep Cleaning)
For a thorough clean, soak the filter in a bucket filled with warm water and filter cleaner. Follow the product instructions, most require 8–12 hours. This step removes oils, lotions, and fine particles that rinsing alone can’t handle.
5. Rinse Thoroughly Again
After soaking, rinse the filter completely to remove any cleaner residue. Leftover cleaner can mess with your water chemistry.
6. Let the Filter Dry (Optional but Helpful)
Allowing the filter to air dry fully helps kill bacteria and extend its lifespan. This works best if you have a spare filter to rotate in.
7. Reinstall and Power Back On
Once clean (and dry, if applicable), reinstall the filter and turn your hot tub back on.
Pro Tips for Longer-Lasting Filters
- Rotate two filters so one can dry while the other is in use
- Shower before soaking to reduce oils and lotions
- Clean filters before adjusting chemicals, dirty filters throw off readings
- Inspect pleats regularly for tears or flattening
If a filter stays discoloured, smells bad, or doesn’t improve water flow after cleaning, it’s probably time for a replacement.
Common Mistakes to Avoid
- Using bleach or harsh chemicals
- Cleaning with a pressure washer
- Skipping regular rinses and only deep cleaning
- Running the hot tub without a filter installed
These shortcuts can damage your filter or create bigger water problems.
A little routine care goes a long way. Your hot tub (and your wallet) will thank you.