New Hot Tub Owner FAQ: The Most Common Questions Answered

A hot tub is the perfect place to switch off and unwind. But if it’s your first one, there are a few things worth knowing — from day-to-day care to ideal temperatures and using it through winter. Here are the questions we get asked most often by new owners, with practical answers so you can enjoy your spa with zero stress.

1. How often should I change the water in my hot tub?

A hot tub is a true wellness oasis — but only if the water stays clean and fresh. On average, you should change the water every 3 to 4 months, depending on how often it’s used and how many people use it.

Tip: If the water turns cloudy, smells off, or develops slimy residue, it’s time for a change.

2. Which chemicals do I need for hot tub care?

The right water care keeps your hot tub hygienic and the water comfortable to sit in. The essentials are:

• Sanitiser (chlorine granules or bromine): kills bacteria and germs.
• pH adjusters (pH Up / pH Down): keep pH between 7.2 and 7.8.
• Shock treatment: oxidises contaminants and clears the water.
• Alkalinity adjuster: stabilises pH.
• Calcium hardness products: prevent corrosion and scale.

Test your water 2–3 times a week with 3-in-1 test strips, or grab everything in one go with our Starter Hot Tub Chemical Kit.

3. What temperature should my hot tub be?

The ideal temperature comes down to personal preference:

• 37°C: a comfortable, relaxing soak.
• 39–40°C: great for muscle relaxation and cooler months.

Children should only use the hot tub at a maximum of 37°C and for shorter sessions.

4. Can I use my hot tub in winter?

Yes — a hot tub is especially enjoyable in winter, but it does need a bit of extra care:

• Use a quality insulated cover to retain heat.
• Keep the temperature constant to avoid frost damage.
• If you’re not planning to use it through winter, properly winterise the hot tub by draining it fully and storing it correctly.

5. How do I keep the water crystal-clear?

• Regular testing: make sure all values stay in the optimal range.
• Shower before getting in: avoids oils, lotions and dirt entering the water.
• Filter care: rinse the filter weekly, deep-clean monthly with a filter cleaner, and replace it roughly every 6 months.
• Weekly shock treatment: removes organic contaminants.

6. Can I use bath bombs or essential oils in a hot tub?

No. Bath bombs and essential oils aren’t suitable for hot tubs — they leave residue that can clog the filter and cloud the water. Use proper hot tub aromatherapy products designed for spa systems instead.

7. How many people fit in a hot tub?

The size of your tub determines comfortable capacity:

• 2–3 people: ideal for couples or smaller spaces.
• 4–6 people: perfect for families or small groups.
• 7+ people: great for sociable evenings with friends.

When choosing a hot tub, look at seating layout and the space you have available.

8. How do I drain and refill my hot tub?

1. Switch off the power.
2. Attach a garden hose to the drain valve.
3. Open the valve and let the water drain out completely.
4. Wipe down the inside, then refill with fresh water through the filter housing to prevent air locks in the pipework.
5. Switch the power back on and balance the water chemistry.

Tip: change the water every 3–4 months to avoid build-up and keep performance at its best.

Conclusion

A hot tub gives you proper relaxation — as long as you look after it. With regular care, the right chemicals and good water quality, your spa stays hygienic and inviting. Follow these basics and you’ll get crystal-clear water, low maintenance costs and many years of enjoyable soaks.