DE pool filter grids provide the essential framework for diatomaceous earth filtration systems, creating the structure that holds DE powder coating for superior pool water clarity. Our replacement DE grids are manufactured with chemical-resistant polypropylene fabric and reinforced ABS resin frames built to withstand repeated backwashing cycles, chlorine exposure, and challenging water chemistry. SpiroPure universal grids fit popular models from Pleatco, Filbur, Unicel, Hayward Pro-Grid and MicroClear series, Pentair, and other major manufacturers. From compact 24 sq. ft. sets to large-format 72 sq. ft. grids (36" in length), our compatible replacements deliver OEM-quality filtration performance at better value. Replace damaged, torn, or clogged grids to restore optimal water clarity. Read more about maintaining DE pool filters.