How Often Should You Change Hot Tub Water

3 min read

Every 1 to 3 months. Change it more often, closer to every month, if the tub gets heavy use, especially by several people.

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Keeping the water clean isn’t just about looks. It helps your spa run properly, stay fresh, and feel more relaxing. Here’s what you need to know.

Why do you need to change the water?

Even when your water looks clear, it still builds up things like oils, dirt, and chemical residue over time. The longer you leave it, the harder it gets to balance the chemicals and keep it fresh. The right products, like those in the AquaSolus chemical range, make the balance easier to hold between changes.

Here are some good reasons to change your hot tub water regularly:

  • Cleanliness: Water collects sweat, lotions, and skin cells even if you can’t see them.
  • Jet and filter health: Fresh water helps your filters and jets last longer and work better.
  • Smell: Old water can start to smell stale, even when treated with chemicals.

We go into more detail in our guide on how much chlorine to use if you’re struggling with water care.

How can I tell when it’s time to change the water?

You don’t always have to wait for the 3-month mark. Sometimes your spa will show signs that it needs fresh water sooner.

Look out for these signs:

  • The water looks cloudy, murky, or foamy
  • There’s a strong smell, even after adding sanitizer
  • You keep adding chemicals but the balance still won’t hold

How to make your hot tub water last longer

If you want to get closer to the 3-month mark, a few simple habits can help. These will reduce how much dirt and bacteria get into the water.

  • Shower before getting into the tub
  • Use a well-fitting insulated cover when not in use
  • Stick to the right amount of chlorine or bromine
  • Rinse and clean your filter weekly (see our filter cleaning guide)

These steps can help keep your water clearer for longer and reduce the number of chemical adjustments you need to make.

Moving up from an inflatable? Our plug and play hot tubs plug into a standard socket too, with proper filtration and insulation that help the water last longer.

Want to learn more about caring for or choosing the right hot tub? These guides will help:

If you’re ever unsure or need help with your water care, you can reach out to us anytime. We’re happy to guide you.

Keep planning

Keep your water balanced with the AquaSolus chemical range.

Want to see one first? Visit a showroom and sit in a hot tub before you choose.

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