Typically, a hot tub under normal use needs to be flushed with Fresh Start and drained once every 3 months. This is just a guideline as this will depend on volume of water in the spa, as well as bather load.
To best determine when a spa needs to be drained, use either a TDS meter or test strips that read TDS (TDS stands for Total Dissolved Solids and is the concentration of chemicals or solids in the water). Some spa dealers will have a TDS meter at their shop, and most will carry a good range of test strips. If not, both the meter and the strips are readily available from online suppliers. Follow the instructions provided by the manufacturer of the test equipment.
There will be instances when you may need to change the water regardless of the TDS reading or calendar schedule.
- The water may become too foamy, usually a result of either detergent remaining in swimwear after laundering, or cosmetic products.
- The water has become cloudy.
- The water has a noticeable odor or color
These conditions can sometimes be remedied but it usually takes more time and chemicals than draining and starting over. IMPORTANT: be sure to flush your spa with Arctic Pure Fresh Start before draining the water.
