Fairmount Minerals Pool Filter Silica Sand 20‑Grade Silica 50 lbs

<p>Ecologically safe sand does not solidify and will help prevent clogging and channeling 100% natural sand is chemical-free and backwashes easily and evenly. Filters out insects, leaves, oils, dirt, dust, hair, and algae from pool water odorless, premium-grade swimming pool sand filter media. The premium pool filter sand does not stain and ensures easy maintenance at a lower cost by filtering out dust, algae, suntan lotion, oil, leaves, and insects. This ecologically safe sand does not solidify and will help prevent clogging and channeling. Inert and odorless, 100% natural sand is chemical free and backwashes easily and evenly. For residential &amp; commercial sand filters.</p>

• It's important to add the correct amount of sand, in pounds, to your pool filter tank. Too much or too little filter sand, and your filtration will suffer. Check your filter label for the required sand amount, or your filter model's owner's manual, or find your filter on our website product pages. Below is an approximation, based on filter tank diameter. 
• • 16" Tank Diameter uses 100 lbs Filter Sand
• • 18" Tank Diameter uses 150 lbs Filter Sand
• • 19" Tank Diameter uses 175 lbs Filter Sand
• • 20" Tank Diameter uses 200 lbs Filter Sand
• • 21" Tank Diameter uses 225 lbs Filter Sand
• • 22" Tank Diameter uses 250 lbs Filter Sand
• • 24" Tank Diameter uses 300 lbs Filter Sand
• • 27" Tank Diameter uses 350 lbs Filter Sand
• • 30" Tank Diameter uses 500 lbs Filter Sand
• • 36" Tank Diameter uses 700 lbs Filter Sand