The startup process for below-ground pools involves several key steps to ensure the pool is properly prepared and ready for use. Here’s a general description of the startup process for below-ground pools:

1. Pool Cleaning: Start by removing any debris, leaves, or dirt from the pool using a pool skimmer or net. Clearing the pool of any visible debris is important before proceeding further.
2. Water Filling: Fill the pool with water to the desired level. Ensure the water level is appropriate, typically midway up the skimmer opening or as specified by the pool manufacturer.
3. Water Balance: Test the water for pH, alkalinity, and sanitizer levels using a pool water testing kit. Adjust the water chemistry as needed to achieve the recommended balance. This involves adding chemicals such as pH increaser or decreaser, alkalinity increaser, and sanitizer (such as chlorine or bromine) according to the test results.
4. Filtration System: Ensure the pool’s filtration system is properly installed and functional. This typically involves connecting the pump, filter, and any other related equipment according to the manufacturer’s instructions. Start the filtration system and allow it to run for several hours to circulate and filter the water.
5. Shock Treatment: Consider applying a shock treatment to the pool. Shocking helps eliminate any bacteria, algae, or other contaminants present in the water. Follow the instructions on the pool shock product and allow the water to circulate for the recommended period before proceeding.
6. Safety Measures: Install safety equipment such as pool fences, alarms, or covers as required by local regulations and for the safety of users, especially if children are present.
7. Regular Maintenance: Once the pool is up and running, establish a routine maintenance schedule. This typically includes monitoring and adjusting water chemistry, regular cleaning of the pool surfaces, skimming debris, and maintaining proper filtration.

It’s important to note that the specific steps and requirements for starting up a below-ground pool may vary depending on factors such as the type of pool, its size, the pool equipment used, and local regulations. It’s always recommended to consult the pool manufacturer’s instructions and guidelines or seek professional assistance for specific startup instructions tailored to your pool.