How to Clean Hot Tub Filters

What You'll Need
Owner's handbook
Hose pipe
Soft brush
Overnight filter soak from hot tub supplies shop

Hot tub filters are the first line of defense against dirty water. All the time that the tub is in use the filter is processing and removing any harmful particulates or other matter from the water. To keep the filter working well you need to clean it every 2 weeks.

Step 1 – Owner’s Handbook

Read through your owner's handbook to find out where the filter is and how to remove it. Filters vary, so there isn’t a standard location. Switch off the hot tub before you remove the filter. When you have removed the filter, trip the circuit breaker to prevent any possibility of an automatic start up by the hot tub.

Step 2 – Check the Filter

The filter is like a large air filter from a motor vehicle and will be covered with debris. Look for any tears in the filter or any sign of weakness. If the filter is not firm, it needs to be replaced.

Step 3 – Remove Large Accumulations of Material

With a soft brush you will probably be able to remove some of the larger clumps of material that have been filtered from the water. Don’t scrub the filter, simply run the brush down the sides and let the bristles remove all that they can.

Step 4 – Wash the Filter

Wash the filter down with the jet from a hose. Don’t use a pressure washer–it will be too powerful.

Step 5 – Soak the Filter Overnight

If possible, soak the hot tub filter in a specially-formulated solution overnight. Any hot tub supply store will have the appropriate solution.

Step 6 – Rinse with a Hose

After soaking the filter, you will find that the jet spray from a water hose will rapidly clean the remaining particulars from the filter. Check for any damage or limpness in the filter and ensure it is completely clean.

Step 7 – Clean the Filter Housing

Clean out the cylinder (the housing) from which you removed the filter. Clear any accumulations of dirt and any debris that might have fallen off the filter when you removed it.

Step 8 – Replace the Filter and Run the Tub

Replace the filter, making sure you insert it correctly. Close the circuit breaker and run the tub on its highest setting for a couple of minutes to get rid of any air and then use it as normal.  

To save the inconvenience of the hot tub being out of use while you are cleaning the filter, buy a spare to use while you clean the dirty one.