Written by: Hot Tub

How To Clean a Hot Tub Filter?

Cleaning your hot tub filter is a crucial aspect of maintaining your spa’s performance and ensuring a safe, enjoyable soak. Over time, mineral deposits and calcium buildup can restrict water flow through the filter, leading to poor circulation and unsanitary conditions in the hot tub.

In this blog post, we will guide you through an easy step-by-step process on how to clean a hot tub filter effectively while sharing some essential maintenance tips that will prolong its life and keep your spa running efficiently.

Steps For Cleaning A Hot Tub Filter

To clean a hot tub filter, first turn off the power to the spa and remove the filter from its housing before rinsing it down with a garden hose to remove any loose debris.

Then, soak the filter in a cleaning solution specifically designed for hot tub filters, such as vinegar or an eco-friendly alternative, to break up mineral and calcium deposits.

Remove And Rinse The Filter

One of the first and easiest steps to clean a hot tub filter is removing it from the filtration system and giving it a thorough rinse. Over time, debris such as leaves, dirt, hairs, body oils or any other external contaminants can accumulate on the filter’s surface, which may affect its effectiveness and potentially damage your spa equipment.

Once you have safely removed the filter from its housing, use a garden hose with a spray nozzle attachment to gently wash away all visible dirt and debris. Make sure to work in between each pleat of the cartridge while spraying at an angle for best results.

An alternative option is using a specialized cleaning tool designed specifically for spa filters.

Soak The Filter In A Cleaning Solution

After removing and rinsing the filter, it’s time to soak it in a cleaning solution. This will help dissolve any remaining dirt or debris that may have been missed during the initial rinse.

Fill a bucket with enough water to submerge the filter completely, then add an appropriate amount of cleaning solution based on the instructions provided by its manufacturer or as recommended by your hot tub’s manual.

Place the filter in the bucket and let it soak for at least 12 hours, but preferably overnight.

Video Credit: Hot Tub University

Rinse And Reinstall

Once you’ve soaked the filter and let it dry, the next step is to rinse it thoroughly with clean water. Use a garden hose or a faucet sprayer with moderate pressure to remove any remaining dirt or debris on the filter.

Make sure to get between all of the pleats to ensure a thorough cleaning. After rinsing, inspect the filter for signs of damage such as holes, tears or deformities. If you find any issues, replace your filter immediately.

Once satisfied that your filter has been thoroughly cleaned and checked for damage, reinstall it into your hot tub according to manufacturer instructions so it fits snugly in its housing.

Routine maintenance is vital in keeping up a clean hot tub system, and one essential aspect of this is regularly cleaning and maintaining the spa’s filters. By following these steps mentioned above, including taking care while rinsing off accumulated debris from filters will help enhance filtration efficiency which leads to improved sanitization levels crucial in preventing bacteria build-up within your spa’s water supply that can create health concerns down-the-line.

Tips For Maintaining A Clean Filter

To ensure your hot tub filter stays clean, it’s important to clean it regularly, replace it when needed and maintain proper chemical balance in the water.

Clean The Filter Regularly

Cleaning your hot tub filter regularly is crucial for maintaining clean and healthy water. A dirty filter can lead to reduced water flow, which puts a strain on the pump and affects the overall health of your hot tub.

Depending on how often you use your hot tub, it’s recommended to clean the filter every 4-6 weeks.

To clean the filter, start by removing it from the hot tub and giving it a thorough rinse with a hose or pressure washer to remove any loose debris. Next, soak the filter in a cleaning solution specifically designed for spa filters to break down any stubborn mineral buildup or calcium deposits.

By cleaning your hot tub’s filters regularly, you’ll not only prolong their lifespan but also ensure that they’re doing their job effectively in keeping your water safe and clear.

Replace The Filter When Needed

It’s important to remember that cleaning the filter is only a temporary solution. Eventually, your hot tub filter will need to be replaced altogether. The lifespan of your filter depends on how often you use your spa and the amount of debris in the water.

It’s also essential to make sure you’re replacing the filter with the right one for your specific hot tub model. Don’t assume that all filters are created equal – different brands and models may have varying requirements for their filtration systems.

Use Proper Chemical Balance In The Hot Tub Water

Maintaining the right chemical balance in your hot tub water is crucial for keeping your filter clean and functioning optimally. The chemicals used in hot tubs, such as chlorine and bromine, help kill bacteria and other harmful elements present in the water.

To ensure proper chemical balance, test your hot tub water regularly using a test strip or kit. You should aim to maintain a pH level between 7.2-7.8 and alkalinity levels between 80-120 ppm (parts per million) for optimal filtration efficiency.

By maintaining proper chemical balance and being mindful of what you put into your hot tub water, you can prolong the life of your spa filter while ensuring it functions efficiently to keep your spa experience enjoyable all year round.


In conclusion, cleaning a hot tub filter is an essential part of maintaining the hygiene and efficiency of your hot tub. By following the steps outlined above, you can easily clean your filter and keep it in top condition for longer use.

Regularly cleaning your filter, replacing it when needed, and ensuring proper chemical balance in the water are important aspects of routine maintenance for any hot tub owner.

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Last modified: August 18, 2023