Have you ever been having a relaxing soak in your home hot tub and noticed white flakes floating in the water?

Luckily this isn’t dandruff, but it could be a sign that your hot tub needs a bit of TLC. There are two main causes of white flakes in a hot tub, one being calcium deposits and the other being biofilm. Both issues should be addressed as soon as possible, or contact the team at BMS Spas for hot tub maintenance and advice.


How to find out what is causing white flakes in your hot tub

Before you start to get rid of the white flakes and use your hot tub again, it’s important to work out what is causing them. In order to do this, you should:

  1. Take a sample of your hot tub water containing the white flakes (120-250 ml should do it!)
  2. Add 15-20 drops of bleach or liquid chlorine and then leave the mixture for 30 minutes.
  3. If the flakes are still there after this time it is most likely due to calcium deposits, and if the white flakes disappear it’s probably the result of a biofilm build up.


How to get rid of white flakes caused by calcium deposit

White flakes in your hot tub caused by calcium deposit tend to be caused by a pH balance in the water. Use a test strip to confirm this, and if the pH levels in your hot tub are too high add a pH down chemical to balance it. Aim for a pH level between 7.4 and 7.6.

If you’re in a hard water area (like we are here in Norfolk) you may come across this issue and want to take steps to soften the water in your hot tub. A calcium build up can start to damage your hot tubs filter and fixtures, and even cause stains.

As well as general hot tub cleaning and maintenance, you should try to shock your hot tub once or twice a week (depending on how often you use it). ‘Shocking’ your hot tub involves adding a shocking treatment to the water to help prevent contaminants, bacteria, and by products. Check out our full hot tub shock guide here!


How to get rid of white flakes caused by biofilm

Unfortunately, white flakes in your hot tub caused by biofilm can be a sign of a larger issue that needs to be addressed. We recommend a full drain and clean to remove any bacteria as it can cause skin irritation and be harmful to you and your hot tub!

You should start by shocking your hot tub. Even though you will then be draining it this gets rid of any mold or bacteria that is in the pipes. There are a few safe ways to drain your hot tub, read our expert guide on how to drain a hot tub or get in contact with the BMS Spas team.

When it comes to preventing white flakes caused by bio film in the future there are a few ways to keep your hot tub flake free!


Are you worried about white flakes in your hot tub?

Don’t fret, if you need assistance with a calcium build up or biofilm problem in your hot tub, speak to BMS Spas. Our hot tub maintenance and cleaning programs are the best way to combat white flakes for good.