TDS Test Strips

Truly answers the most common question asked in the hot tub industry _how often should I change my water_. The common answer provided is every 3 to 4 months depending upon usage, which is not exactly accurate. Though for owners that use their spas on average 3 times a week and properly use chemicals as prescribed the 3 to 4 month answer usually holds true but not always. The time to change the water is when the water has become over saturated with chemicals causing any new chemicals that you add to become ineffective. Example: adding salt to a glass of water makes salty water. If you continue to add salt at some point it will not dissolve and simply fall to the bottom of the glass. TDS test strips provide an accurate level of Total Dissolved Solids which should never exceed 3000. RECOMMENDED USE Easy to use, simply dip strip in water for one second, remove and wait 15 seconds for color code reading.