Hot Tub Water Troubleshooting

Hot Tub Water Troubleshooting – ThermoSpas

Most hot tub water chemistry problems can be diagnosed quickly with a simple test strip that is dipped into the water. The following trouble shooting guide will help you determine the cause of the more common hot tub water problems you will encounter, and offers recommended solutions.

 Problem  Cause  Solution
Cloudy water Dirty Filter Clean filter with filter cleaner
High TDS levels Drain and refill with fresh water
High pH or alkalinity Test and add pH/Alkalinity Down
High calcium count Test, drain halfway and refill
Dissolved solids Add clarifier to your water
High bacteria level Shock with sanitizer you currently use
Brown water High mineral count Add Stain & Scale Preventer
Low alkalinity level Test and add pH/Alkalinity Up
Low sanitizer level Test and add sanitizers
Green water Algae growth Shock with sanitizer
Yellow water Low pH Test and add pH/Alkalinity Up
White scale deposits Low sanitizer level Test and add sanitizer
Soft water Test and add Liquid Calcium
High TDS level Test, drain and refill the hot tub
High contaminant level Add one capful of Foam Away
Waterline scum ring Inadequate filtration Check and clean filter(s)
High content of oils Add Natural & Clear / Scum Bug
Pitting of metal fixtures Low alkalinity or pH Test and add pH/Alkalinity Up
Erratic pH test results Low alkalinity Add pH/Alkalinity Up
Sanitizer level too high Remove cover and turn on bubbling system
Old pH indicator strip Check expiration date and replace
Musty odor Bacteria/algae growth Shock the water with sanitizer
Eye irritation Low pH level Test and add pH/Alkalinity Up
Low sanitizer level Test and add sanitizer
Skin irritation Low sanitizer level Test and add sanitizer
Sanitizer irritation After adding sanitizer always wait 20 minutes before entering hot tub
Water temp. too high Reduce water temperature
Soaking too long Soak for shorter intervals

Free Computerized Water Testing
If you have any doubts, Thermo Spas offers Free Computerized Water Testing. Just fill any clean plastic container with water directly from your spa and seal it well. Then, send it with your name and account phone number to:

ThermoSpas Customer Care Department
155 East Street
Wallingford, CT 06492

Your Customer Care representative will call you to discuss the results and walk you through the steps required to balance your water.