When it comes time to close your pool, you'll want to put some pool water in your sensor storage cap and screw it back onto the sensor. Place the sensor and monitor in your garage or storage area until you are ready to use it next season.
Although the Crystal Water Monitor App does not have a specific Pool Closure feature to enable, you can turn off notifications on your mobile phone to prevent chemical actions from popping up from time to time.
To turn off notifications for your Apple iPhone, do the following:
Go to Settings > Notifications> Crystal, then turn off Allow Notifications.
For Android Devices:
Go to Settings > Tap Notifications > Select App Settings > Select Crystal > Turn Notifications Off