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It’s a good idea to wait at least 24 hours after opening your pool before you swim in it. Pool opening often involves shocking the water, and the chemical levels need to come down a bit before it’s safe to swim. You can continue testing your water pH and chlorine levels if you’re in a rush. It’s wise to wait until your chlorine levels drop to under four parts per million (ppm) and you have a water pH of between 7.2 and 7.8. You can artificially lower your water pH to speed up the process.

Calcium lumps in a pool are calcium deposits that form when a pool's water parameters are not in the normal range. They can float around on the surface of the pool water, making it look and feel dirty. The most common causes of calcium lumps in pools are calcium hardness above 1,000 ppm, alkalinity over 120, and a pH over 7.8. Keeping your pool’s calcium levels, alkalinity, and pH levels within the normal, safe ranges is the best way to prevent calcium lumps and other problems, including damage to the pool surface.

It can take anywhere from 12 to 24 hours to fill the average pool with water—and that’s if you use a couple of garden hoses. A water delivery service can fill your pool in one to three hours. Some services even pre-treat the water so it’s swim-ready as soon as it’s filled.

Natural pools don’t necessarily attract snakes, although there is a chance they could stop by for a quick visit. They’re not likely to stay, however, because there’s nothing for snakes to eat in a natural pool environment. A well-maintained natural pool has clear water, so you should be able to easily spot a snake before diving in.