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How to Clean a Hot Tub Filter (The Easy Way)

By March 1, 2024Hot Tub
How to clean a hot tub filter

Do you want clear, clean, and relaxing hot tub water? A regular filter cleaning routine is an absolute must. Contrary to popular belief, hot tub maintenance doesn’t have to be complicated or time-consuming. This straightforward guide will walk you through when, why, and how to clean your hot tub filter like a pro in 5 simple steps. Let’s dive in!

The Importance of a Clean Hot Tub Filter

Firstly, you’re ensuring enhanced performance from your hot tub when you regularly clean the filter. A neglected filter can impede the circulation of water in your hot tub, hampering its performance. A routine cleaning schedule for your filter fosters better water circulation, thus enhancing the efficiency of the filtration system. Consequently, water will be crystal-clear and the hot tub experience is markedly improved.

Preserving Water Quality

The filter is the gatekeeper that keeps impurities like dirt, oils, and bacteria at bay. A lapse in regular cleaning can lead to deteriorated water quality, making the hot tub less inviting. By cleaning the filter, you ward off issues like algae proliferation, murky water, and undesirable odors.

Boosting the Longevity of Your Hot Tub

Finally, a clean filter doesn’t just ensure a pleasant soak but extends the life expectancy of your hot tub. By averting debris accumulation, you prevent potential damage to other hot tub components, saving yourself from costly repairs or replacements. So, as you nurture your filter, you’re also nurturing your investment.

Remove and soak a hot tub filter to clean it out.

5 Simple Steps to Clean a Hot Tub Filter

Cleaning your hot tub filter regularly doesn’t require any special skills – just a plan and the desire for a pleasant hot tub hang, every time.

Step 1) Turn Off the Power – Safety first! Locate the breaker box and switch the hot tub’s power off. This ensures you can safely access the filter housing without any electrical hazards.

Step 2) Remove the Filter Cartridge – Once the power is off, find the access panel on your hot tub that leads to the filter. Carefully pull out the filter, making note of which direction it was facing so you can reinstall it correctly later.

Step 3) Rinse Away Loose Debris – Use a hose or sink sprayer to rinse the filter, starting from the top and working downward. This washes away any loose dirt or debris caught in the pleats. Avoid using high pressure, which can damage the filter.

Step 4) Deep Clean with Filter Cleaner – For a thorough clean, soak the filter in a solution of filter cleaner and water. Let it soak for 1-2 hours to really break down oils and mineral deposits trapped deep in the filter pleats.

Step 5) Rinse and Dry Completely – Rinse away any cleaner residue until the water runs clear. Allow the filter to air dry for at least 24 hours before putting it back in – moisture left inside can breed bacteria!

And that’s it – you’ve restored your filter to like-new condition! Just repeat these simple steps every month or so for clean, healthy hot tub water all year long.

Proper water chemistry is important to a clean hot tub filter.

Other Recommended Maintenance

It’s a good practice to test and balance your water chemistry weekly. Keeping pH, alkalinity, and sanitizer levels in the recommended range inhibits bacteria growth and corrosion of metal components. Consider using test strips for convenience.

Inspect your hot tub regularly for any leaks, unusual sounds from pumps or jets, or damage around seals and gaskets. Early detection of minor issues can prevent the need for costly repairs down the road. Tighten fittings and replace worn parts promptly.

Shock treat the water periodically even when not in heavy use, and always after heavy bather loads. Shocking helps destroy contaminants and replenish sanitizer levels between regular water changes. Replace or clean hot tub covers, pillows, and filters according to manufacturer guidelines. These tasks may be required more frequently depending on usage.

When to Call a Professional

Most crucial hot tub maintenance can be done independently. However, if you encounter persistent issues with water clarity or unusual sounds, or if the hot tub components exhibit signs of damage despite regular maintenance, it’s wise to call in a professional. They can provide expert solutions and prevent minor issues from escalating into major problems.


To wrap up, a well-maintained hot tub filter is the cornerstone of a satisfying and safe hot tub experience. By adhering to a routine cleaning schedule and seeking professional help when necessary, you ensure that your hot tub remains a rejuvenating retreat for years to come. If you have any questions or concerns with the condition of your hot tub or spa area, the experts at Alpha Building Inspections are here to help in Merrimack, New Hampshire, and surrounding areas.