Before investing time in extensive testing procedures it is important to gather information about the pool's actual water loss. When gathering information, you should first determine if there really is a leak. A “Bucket Test” can be performed to determine how much of the observed water loss is due to evaporation and how much is due to a leak. Other tests such as the “Pump On/Pump Off Test” will provide a useful base of information that will be helpful as you continue the leak detection process. If you want to be more efficient when determining a location of the leak, The Leakalyzer Water Loss Sensor assists by enabling the collection of this information in minutes rather than days.
Here are some helpful resources when gathering information: