High Quality Content by WIKIPEDIA articles! Traditionally, the filter in a pool or spa is the hardest piece of equipment in the water care system. They work continuously to keep debris and sediments from the water. So when selecting a system – you want to have all the facts to ensure that your selection is durable and not fraught with flaws that can keep you from enjoying your spa. So here are the current technologies that dominate the market today with a narrative that walks you through how they work. Then we walk through a simple guide on how to take care of your system to ensure its longevity.