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.

The best way to dissolve algae is to use pool shock. The shock increases the free chlorine levels in your pool, which in turn kills bacteria, microorganisms, and algae. You can opt for granulated shock that you mix with water or a premixed liquid shock.

Keep in mind that using pool shock is just one of the steps you need to take to get rid of algae from your pool. Unless you also brush, vacuum, and clean the filter, your algae problem may return.

It’s fair to be concerned about handling pool lights or wiring in a pool filled with water. But fortunately, pool lights and swimming pools are designed to make it easy and safe to replace the lights without needing to drain the water. Instead, you can turn off the electricity to the pool as a safety precaution, unscrew the pool fixture, pull it up and out to the side of the pool, then change the bulb.

The most expensive part of building a pool is typically the excavation and labor, which can account for 25% to 50% of the total project cost. This is particularly true for inground pools that require significant excavation, potentially including the rental of large equipment, and extensive construction labor. In contrast, above-ground pools are generally less expensive as they typically do not require excavation and can be installed much more quickly. Concrete in-ground pools are among the most labor-intensive options.