Question 1

Which hot tub chemicals do I actually need?

Accepted Answer

Sanitiser, pH balancers, total alkalinity increaser, weekly shock and a test strip. These five cover every routine dosing decision.

Question 2

How often should I add chemicals to my hot tub?

Accepted Answer

Test twice a week, dose sanitiser daily after each soak, balance weekly and shock weekly. Refill every 12 to 16 weeks.

Question 3

Can I use swimming pool chemicals in my hot tub?

Accepted Answer

Many active ingredients overlap, but pool products are dosed to m³ not litres. Hot tub doses are far smaller and the risk of overdose is real.

Question 4

Are ClearSpa chemicals safe for inflatable hot tubs?

Accepted Answer

Yes. Every ClearSpa chemical is compatible with inflatable, acrylic and rotomoulded shells. Always dose with the pump running.

Question 5

What is the most common hot tub water mistake?

Accepted Answer

Skipping the weekly shock dose. Without it, combined chlorine builds and the spa develops the strong chlorine smell people associate with poor water.

Question 6

How long does a refill last?

Accepted Answer

Most domestic hot tubs need a fresh fill every 12 to 16 weeks. Heavier use shortens this; light use can stretch to 16 to 20 weeks if dilution and shock are kept up.

Question 7

Where can I learn more about hot tub water care?

Accepted Answer

Visit the ClearSpa Learning Centre for 40 free short courses on pH, sanitisers, filters, shock dosing and energy efficiency.

Hot Tub Chemicals