Spa water has a strong chemical or musty odor even with normal sanitizer levels.

Safety: Avoid using the spa until water chemistry is balanced.

• Test water: Use a reliable test kit to check free and combined chlorine/bromine, pH, and alkalinity.
• Shock treatment: Perform a non-chlorine or chlorine shock according to RivieraPool water care guidelines to break down combined sanitizers.
• Ventilate: Leave the cover open for 30–60 minutes after shocking to allow gases to escape.
• Clean plumbing: Periodically use a RivieraPool-approved plumbing line cleaner to remove biofilm.