You should avoid filling your pool overnight—just as a precaution. You’ll want someone around to check on the progress. If your hose springs a leak or you overfill your pool, you could end up with some costly water damage. At worst, you could flood your home’s foundation. For this reason, ensure someone is home and awake, even if your pool takes a couple of days to fill.

You can usually use the water from your tap to refill your pool, whether it's city water or well water. If you're going to use well water to fill your pool, make sure you have an adequate amount of water available and that the water is free of contaminants. A water delivery service may also be able to bring water to refill your pool.

Pool pumps should work discreetly and quietly. If you hear loud screeching or grinding sounds from your pool pump, it’s a good indication that its motor is starting to fail and may need replacing.

Generally, you should run your pool pump for eight to 12 hours a day to keep your water clean and chemical levels balanced. The ideal runtime can vary depending on your specific pump type. While running the pump as much as possible is ideal for cleanliness, it can increase electricity costs. To save money, you can run the pump strategically during non-peak hours when electricity is cheaper, which is often in the evenings or at night. The hours do not need to be consecutive.