It’s a good idea to run the pool pump while swimming because your filter and skimmers will be active to help keep the water clean. Additionally, if you have pool features, you would naturally keep those pumps running while you swim. However, it’s not a requirement to run your pump while you swim.

In combination with adequate filtering and water chemical balance, vacuuming will keep your pool from being overrun with algae. If your pool is experiencing algae growth, the same combination will get rid of it with a bit of patience. Heavy algae growth may require the use of an algaecide, and in some cases, you’ll want to vacuum the pool 24 to 48 hours after using algaecide to remove dead algae debris.

No, shock and chlorine are not the same thing, though they are related and both are used for pool maintenance. Regular chlorine, often in the form of tablets, is a sanitizer used for routine, day-to-day maintenance to keep a steady chlorine level. Pool shock, however, is a highly concentrated dose of chlorine used periodically for a more intense cleaning. It rapidly raises chlorine levels to fix issues like cloudy water or algae growth and also eliminates chloramines, which are byproducts of regular chlorination. Because their purposes and concentrations differ, they are not interchangeable, and proper pool care typically requires using both.

Water only runs through a pool heater when not in use if the heater doesn’t have a bypass system. A bypass system stops the flow of water through the heater when not in use. If you don’t have one, then yes, water will still run through the pool heater even when not in use. Not having a bypass system may increase the effects of wear and tear on your pool heater or disrupt the water’s chemical balance.