As a proud hot tub owner, you’re probably wondering how you can look after your new prized possession for years to come. There are many facets to hot tub maintenance, and keeping on top of your hot tub filter health is just one part of that process.

In this article, we’re going to explain how to clean a hot tub filter. We discuss what one is, why it’s important to clean them, and much more. Read on to learn more about this important topic, and explore our hot tub filter guide for further support.

What’s the Best Way of Cleaning a Hot Tub Filter?

For optimum results, spray a hot tub filter evenly with an instant filter cleaner, wait 15 minutes and then rinse the filter with a hose. Do this once every week for the best results.

What is a Hot Tub Filter?

A hot tub filter is an important part of a hot tub system, and its primary role is to make sure that any water that goes back through the pump and heater is clean and free of any debris.

If you experience issues with your hot tub filter, or you fail to regularly clean it, you run the risk of damaging your hot tub further down the line.

How to Clean Hot Tub Filters

So how do we go about avoiding these issues for our hot tubs? There are three main ways to clean hot tub filters, these are – thorough rinsing, using filter cleaner spray and soaking.

Thorough Rinsing

If you’re somebody who is consistent with hot tub maintenance, you might be perfectly fine with simply rinsing your filter on a weekly basis.

By rinsing your hot tub filter every week, you’ll easily be able to remove large amounts of debris. We recommend doing this with the water from a garden hose. Simply follow these four steps:

  1. Turn off your hot tub
  2. Remove the filter
  3. Use a garden hose to thoroughly clean the filter
  4. Allow time for your filter to dry before reinstalling it.

Using Filter Cleaner Spray

A more effective method of cleaning your hot tub filters is by using a specific hot tub filter cleaner. Simply follow these six steps:

  1. Turn off your hot tub
  2. Remove the filter
  3. Spray your filter evenly with the cleaner
  4. Wait 15 minutes
  5. Rinse your filter with water
  6. Allow time for your filter to dry before reinstalling it.

Via Soaking

An additional recommended hot tub filter cleaning method is to soak the filters in a bucket overnight with a filter cleaner solution. This solution breaks down oils from the pleats and gives the filter a deep clean. Simply follow these six steps:

  1. Turn off your hot tub
  2. Remove the filter
  3. Soak the filter in a bucket that contains a mixture of water and filter cleaner
  4. Leave it overnight
  5. Rinse your filter with water
  6. Ensure your filter is air dry before placing back into your hot tub.

Why is it Important to Keep a Hot Tub Filter Clean?

As discussed, it’s really important that you keep on top of cleaning your hot tub filters, and this is because a number of things can occur if you don’t. These include – damage to other parts, dirty water and low flow.

Damage to Other Parts

By letting your hot tub filter become dirty over time, you run the risk of causing damage to other vital parts of your hot tub. Dirty filters have a knock-on affect to the heater, sensors, pumps and other key working parts.

This means that these parts will eventually become faulty, and will need to be replaced, becoming an ongoing cost you’ll have to fork out for. This is something we want to avoid.

Dirty Water

If you fail to clean your hot tub filters on a regular basis, you’re likely to experience dirty water within your tub, and nobody wants that. You’ll struggle to entertain friends and family if this is the case. Furthermore, there’s even a chance you’ll experience green water in your hot tub due to a dirty filter.

Working together with a sanitizer of your choice (bromine or chlorine), a filter is crucial for keeping your hot tub water clean and enjoyable.

Low Flow

Low flow is another negative side effect of not keeping your hot tub filters clean. Low flow is when your hot tub is struggling to produce the right amount of flow throughout your hot tub system. The sensors on a hot tub will realise this and subsequently your hot tub heater might automatically turn off, meaning that your hot tub won’t be fit for purpose.

Essentially, low flow causes strain on hot tub pumps and less power coming through the jets, making your hot tub less energy efficient.

How Do I Know if Dirty Hot Tub Filters Are Causing Low Flow?

The following diagnostic messages may appear on your touchpad if your filters are dirty; FLO, Heater Dry, LF, DR, OHH, or — (two lines). To confirm that the filters are the cause of the problem, remove them and run the hot tub for a few minutes to see if the message clears.

If the message still does not clear, try switching the hot tub off whilst the filters are removed, and then back on again.

How Often Should I Clean Hot Tub Filters?

This will depend on your usage, but we recommend you clean your hot tub filters at least once every fortnight. Heavy usage will mean your filters clog up quicker.

One thing to note is that the situation is different when you either fill your hot tub for the first time, or whenever you drain and refill your hot tub. In this instance, the filters may clog up within three–four days because of the small particles contained in tap water and any particles from manufacturing/transport.

Quarterly Hot Tub Filter Cleaning

Every 3 months, you should be emptying your hot tub as part of your maintenance schedule. Whilst doing this, we recommend giving your filters a thorough chemical soak.

Weekly Hot Tub Filter Cleaning

On top of quarterly hot tub filter cleaning, we recommend weekly cleaning via either rinsing with clean water or spraying with rapid filter cleaning spray. If you opt for the latter, leave the filter for 20 minutes before rinsing thoroughly.

Contact Us

We hope you enjoyed our guide on how to clean hot tub filters, and now feel confident that you can maintain your filters for a long time.

We want you to enjoy your Platinum Spas hot tub for many years to come, so if you have any further questions following this guide, please contact us and a member of our expert team will be happy to assist you.

Clean Hot Tub Filters FAQs

It is safe to use vinegar when cleaning hot tub filters, however in our experience it isn’t as effective as using an official hot tub filter cleaner.

It is not recommended to use bleach when cleaning a hot tub filter. This is because bleach and most other household cleaning products are likely to damage the fibres of the filter, significantly reducing its lifespan. This will then become a cost to you as the hot tub owner.

If you’re looking to carry out a deep clean of your hot tub filter, we recommend a minimum soaking time of 8 hours. Most people do this overnight, rinsing and reinstalling the filter in the morning.

Each hot tub model is different; therefore, it is important you use the correct filter for the Platinum Spas hot tub you’ve purchased. Please refer to our filter guide, or if you are still unsure, contact a member of our team quoting your make and model.

Jamie Smith