Spa water has a strong musty or rotten egg odor.

Safety: Avoid using the spa until water is properly sanitized.

• Shock the spa: Add a non-chlorine or chlorine shock according to label directions to oxidize contaminants.
• Clean filters: Remove and deep-clean or replace Saratoga filters.
• Use line cleaner: Before the next drain, circulate a spa plumbing line cleaner to remove biofilm, then drain and refill.
• Maintain sanitizer: Keep chlorine/bromine or alternative sanitizer within recommended ranges.