Water is cloudy, foamy, or has a strong odor despite normal operation.

Safety first: Do not use the spa if water is visibly contaminated or has a strong unpleasant odor.

• 1. Test water: Use a test strip or kit to check sanitizer (chlorine/bromine), pH, and alkalinity. Adjust to Coleman-recommended ranges.
• 2. Shock treatment: Add a non-chlorine or chlorine shock according to label directions to oxidize contaminants.
• 3. Clean or replace filter: Rinse the filter thoroughly. If older than 1 year or heavily stained, replace with a Coleman-compatible filter cartridge.
• 4. Flush plumbing: Use a spa system flush product to remove biofilm from internal plumbing, then drain and refill the spa.
• 5. Maintain routine: Establish a regular schedule for testing, shocking, and cleaning filters to prevent recurrence.