Yes.

In order for the Purezone to work optimally, you should always keep your spa clear of any debris and contaminants. 

It is very important to keep the cover on your spa at all times except when you are in the spa, cleaning it or balancing the chemicals.

What will happen if I do not cover the spa and there is small debris and contaminants?

• Missed or failed water chemistry measurements - due to debris or contaminants either clogging the cassette and/or obstructing or clouding the optical window of the Purezone
• Failure to perform on demand "Measure Now" - from the Purezone app for the same reasons

Common types of contaminants:  

• Pollen dust (common in Springtime)
• Soil dust
• Sand and Dust from sand or dust storms  - Desert areas of Arizona, New Mexico, California and Texas in monsoon season - June - September
  • Purezone will not work in spas cloudy with even small amounts of sand / dust buildup.  Daily Water Measurements and ad-hoc "Measure Now" measurements will fail. 
  • Ahead of any dust storm, the spa should always be covered
  • Mineral deposits - Limestone
  • Hard water limestone buildup 
• Mineral deposits - Calcium Carbonate Scale
  • Calcium Carbonate Scale from Spa Salt Chlorine Generators
  • Calcium Carbonate Scale from Spa Water Heaters
  • Calcium Silicate and Calcium Carbonate Scale - How to Remove
• Buildup of sunscreen, body oils, cosmetics and other impurities on the bodies of spa users

Common types of debris:  

• Insects
• Leaves
• Flower petals
• Twigs from shrubs or trees
• Cottonwood seeds
• Poplar Tree buds

Optical Window obstructed - How to resolve

1. Remove the Purezone from the spa
2. Ensure that the spa is clean - without any debris, including regular cleaning of the spa filters  
3. Remove the cassette from the Purezone lab unit
4. Check the bottom of the lab unit for any debris.  If there is any debris, remove it 
5. Using a clean cotton cloth dampened with water, wipe the optical window(s) clean
6. Gently rinse the cassette in clean water to remove any debris
7. Replace the cassette so that it is fully inserted
8. Replace the Purezone in the spa ensuring that the metal strip on the lab unit is pointing toward the spa water and not toward the back of the spa

Ensure the spa water pump is turned on and do a "Measure Now" in the app.  If you are within 6-10 feet of the Purezone, the measurement will complete in about 8 - 13 minutes.  If you are not within 6-10 feet of the Purezone, the measurement will complete in about 45 minutes.

Purezone Optical Windows