HTH Pool Filter Sand, 50 lb. is specially designed for use with both in-ground and above-ground swimming pool sand filters, ensuring your pool stays clean and clear. This high-quality silica sand features a particle size ranging from 0.45 to 0.55 and is classified as 20 grade, making it highly effective in restoring filter efficiency. Compatible with saltwater systems, it comes conveniently packaged in a ready-to-use 50 lb. pour bag, providing an easy and reliable solution for maintaining optimal pool filtration. Model Number: