Spa water is foamy and has a strong chemical or musty odor.

Safety: Avoid using the spa until water chemistry is corrected; contaminated water can cause skin and respiratory irritation.

• Test water: Use a reliable test kit to check sanitizer (chlorine/bromine), pH, alkalinity, and calcium hardness.
• Shock treatment: Add a non-chlorine or chlorine shock product per Hydropool and chemical manufacturer guidelines to oxidize contaminants.
• Clean filters: Remove and thoroughly clean filter cartridges. Consider using a filter cleaner soak.
• Foam control: Use a spa defoamer as a temporary measure, but address underlying water quality by partial drain and refill if TDS is high.
• Regular maintenance: Establish a routine for testing and balancing water and cleaning filters weekly.