HTH D.E. Filter Aid — Powder (Form), 10 lb — Filter aid (pool chemical type) to improve filtration and clear cloudy water

Even with regular cleaning, storms or heavy use can take a toll on your pool water. HTH® Pool Care Diatomaceous Earth Filter Aid helps maintain amazingly blue water by keeping your Diatomaceous Earth pool filter working at maximum performance. D.E. stands for diatomaceous earth, a filter media that traps even the smallest particles and debris (as much as 20 times smaller than sand or cartridge filters or 2-6 micron particles) and restores filter efficiency. This product is great for all swimming pools that use Diatomaceous Earth sand filters, including salt water systems. Keep your Diatomaceous Earth pool filter working at maximum performance and your pool looking amazingly blue with HTH® Diatomaceous Earth Filter Aid.