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Hot Tub water quality troubleshooting

ProblemProbable CauseRemedy
Cloudy Water• Dirty Filters
• Excessive oils/organic matter
• Improper sanitisation
• Suspended particles/ organic matter
• Overused or old water
• Clean filters with FreshWater™ InstantFilter Cleaner or FreshWater Filter Cleaner
• Shock spa with sanitiser
• Add sanitiser
• Adjust pH and/or alkalinity with FreshWater pH/Alkalinity Up or FreshWater pH/Alkalinity Down
• Run jet pump(s) and clean filters with FreshWater Instant Filter Cleaner or FreshWater Filter Cleaner
• Drain, clean and refill the spa
Water Odour• Excessive organics in water
• Improper sanitisation
• Low pH
• Shock spa with sanitiser
• Add sanitiser
• Adjust pH with FreshWater pH/Alkalinity Up to recommended range
Chlorine Odour• Chloramine level too high
• Low pH
• Shock spa with sanitiser
• Adjust pH with FreshWater pH/Alkalinity Up to recommended range
Musty Odour• Bacteria or algae growth• Shock spa with sanitiser—if problem is visible or persistent, drain, clean and refill the spa
Organic Buildup / Scum Ring Around Spa• Buildup of oils and dirt• Wipe off scum with clean rag—if severe, drain the spa, use FreshWater Spa Shine after cleaning to protect the spa shell, and refill the spa
Algae Growth• High pH
• Low sanitiser level
• Shock spa with sanitiser, and adjust pH with FreshWater pH/Alkalinity Down to recommended range
• Shock spa with sanitiser, and maintain sanitiser level
Eye Irritation• Low pH
• Low sanitiser lever
• Adjust pH with FreshWater pH/Alkalinity Up
• Shock spa with sanitiser, and maintain sanitiser level
Skin Irritation / Rash• Unsanitary water
• Free chlorine level above 5 ppm
• Shock spa with sanitiser and maintain sanitiser level
• Allow free chlorine level to drop below 5 ppm before spa use
Stains• Total alkalinity and/or pH too low
• High iron or copper in source water
• Adjust total alkalinity and/or pH with FreshWater pH/Alkalinity Up
• Use FreshWater Stain & Scale to inhibit metals
Scale• Total alkalinity and/or pH too high
• High calcium content in water
• Adjust total alkalinity and pH with FreshWater pH/Alkalinity Down—if scale requires removal, drain the spa, scrub off the scale, clean spa shell with FreshWater Spa Shine, and refill the spa. Add FreshWater Stain & Scale and balance the water using FreshWater pH/Alkalinity Up or FreshWater pH/Alkalinity Down