Question 1

Which hot tub chemicals do I actually need?

Accepted Answer

The routine set consists of sanitiser, pH balancers, total alkalinity increaser, weekly shock and test strips. Together they cover regular treatment decisions.

Question 2

How often should I add chemicals to my hot tub?

Accepted Answer

Make two tests weekly. Sanitiser is added daily after bathing, while balance and shock are handled weekly. Replace the water every 12 to 16 weeks.

Question 3

Can I use swimming pool chemicals in my hot tub?

Accepted Answer

Active ingredients often overlap, although pool dose rates use m³ rather than litres. Spa quantities are much smaller, creating a genuine overdose risk.

Question 4

Are Zagosa Spa & Pool chemicals safe for inflatable hot tubs?

Accepted Answer

Yes. Inflatable, acrylic and rotomoulded shells are compatible with all Zagosa Spa & Pool chemicals. Keep the pump operating during dosing.

Question 5

What is the most common hot tub water mistake?

Accepted Answer

Missing weekly shock is the most frequent mistake. Combined chlorine then accumulates and produces the strong odour commonly linked with poor spa water.

Question 6

How long does a refill last?

Accepted Answer

Domestic spas usually run 12 to 16 weeks between fresh fills. Heavy bathing reduces this period, while light use can reach 16 to 20 weeks with regular dilution and shock.

Question 7

Where can I learn more about hot tub water care?

Accepted Answer

The Zagosa Industrial blog and the free hot tub dosing calculator cover sanitisers, pH, filtration, shock dosing and energy efficiency in practical detail.

Zagosa Spa & Pool Chemicals

Products in this range