We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › Pool Sand Comparison Best Overall Runner-Up Best Bang for the Buck Best Silica Sand Best Zeolite Sand Best Glass Sand How We Chose the Best Pool Filter Sands What to Consider When Choosing a Pool Filter Sand The Advantages of Using Pool Filter Sand FAQs Sand filters are commonly used for keeping your swimming pool’s water clean, but over time, the pool filter sand can become dirty and contaminated, which affects how well the filter can function. For example, pool filter sand can commonly filter debris as small as 20 microns, with 1 micron equal to 1/26,000 of an inch. The best pool filter sand may be able to filter particles as small as 3 microns, though it depends on the type of pool filter sand that’s used. Our favorite is the FairmountSantrol AquaQuartz thanks to its natural formula and easy backwashing.…