CA 
EN 
FR 
DE 
ES 
US 
PL 
Legionella bacteria might sound like something out of a science class, but it’s a real concern for hot tub owners. If not properly maintained, your spa could become a breeding ground for this harmful bacteria.
This guide is based on expert advice from the CDC (Centers for Disease Control and Prevention).
What Is Legionella?
Legionella is a bacteria that grows in warm water. Inhaling mist containing it can cause Legionnaires’ disease (a serious pneumonia) or a milder illness called Pontiac fever.
Who’s Most at Risk?
- People aged 50 or older
- Current or former smokers
- Anyone with lung disease or weakened immunity
The good news is that Legionella can be prevented!
How to Prevent Legionella in Your Hot Tub
Prevention comes down to good hot tub water care and regular maintenance, with the right products from the AquaSolus chemical range. Follow these steps:
1. Maintain proper disinfection levels
- Free chlorine: ≥ 3 ppm
- Bromine: ≥ 4 ppm
- pH: 7.0 – 7.8
Not sure how much to add? Read how much chlorine to add to a hot tub.
2. Clean the tub regularly
Scrub all surfaces, clean your hot tub filter, and clear jets of biofilm or slime.
3. Change the water when needed
Replace spa water every 1–3 months (depending on use) and follow manufacturer guidance on filter replacement. Our guide on how often should you change hot tub water explains the signs to look for.
4. Be cautious with public hot tubs
- Ask how often the water is tested
- Check cleaning and disinfection routines
- Confirm filters and jets are maintained
Know the Symptoms
If you’ve recently used a hot tub and develop a cough, fever, or shortness of breath, seek medical advice and mention your hot tub use.
Preventing Legionella from Hot Tubs – CDC.gov
Hot tubs are designed for relaxation, but they require responsible care. With the right maintenance, your spa will stay safe, clean, and worry-free.