Pool pumps direct water evenly throughout pools so that the chemicals can effectively sanitize the water. They carry water from the pool to the filter, heater, and chlorinator so that it can be filtered, heated, and sanitized before re-entering the pool. Having an effective pool pump allows water to circulate the recommended amount of times per day based on the size of your pool. This helps remove debris from your pool while increasing the effectiveness of your pool chemicals that fight the growth of algae and bacteria in your water.