swimming pool filter sand replacement

{"title":"Multi Media Filter Tanks Mechanical Sand Filter Housing Swimming Pool Filter For Water Treatment Equipment","imgUrl":"https:\/\/img.chinax.com\/nimg\/ff\/38\/47e92ffb67809055b889c8e327a0-200x200-1.jpg","attrs":{"Price":"$5000-50000","Brand Name":"Norson","Minimum Order Quantity":"1 Set","Delivery Time":"5-8 Work Days","Place of Origin":"China","Payment Terms":"L\/C, D\/A, D\/P, T\/T","Supply Ability":"10 Set\/Day","Packaging Details":"Container","Processing Capacity":"Customizable","Material":"Stainless Steel","Operating Cost":"Low","Control Mode":"Automatic","Application":"Sewage Treatment","Capacity":"Customizable","Installation":"Easy","Warranty":"1 Year"}}

{"title":"Light Weight Durable Poly Balls Filter Media Swimming Pool Cleaning Support","imgUrl":"https:\/\/img.chinax.com\/nimg\/1d\/ce\/9bdc35435237692a35dd4578bf3b-200x200-1.jpg","attrs":{"Price":"$4.6-6.5\/box","Brand Name":"HUISEN","Model Number":"HS-FB","Minimum Order Quantity":"2000 boxes","Delivery Time":"According to the quantity","Place of Origin":"China","Payment Terms":"T\/T, Western Union","Supply Ability":"1500kg per week","Packaging Details":"700g per plastic bag, one plastic bag per colorful box, 2100 boxes per 20GP","Measurement":"50-60mm","Material":"Polyester","Advantage":"Durable","Application":"Swimming pool cleaner equipment","Package":"Colorful box, 700g per box","Color":"White","Cleaning method":"By washing machine","Item":"Light Weight Durable Pool Filter Ball Swimming Pool Cleaner Equipment"}}

{"title":"21TPH Ultrafiltration UF System Swimming Pool Water Purifier Industrial Waste Water Treatment UF Filter","imgUrl":"https:\/\/img.chinax.com\/nimg\/7c\/03\/e2a00309c6a5ea43ecc9ce86ebcc-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"Kaiyuan","Model Number":"KYRO-21TPH","Minimum Order Quantity":"Negotiation","Delivery Time":"15-30working days(depand on raw materials stocking)","Certification":"ISO9001, CE, SGS","Place of Origin":"Guangzhou, China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":">300sets\/month","Packaging Details":"export standard wooden case(plywood), no need to fumigate, suitable for shipping.","Name":"Ultrafiltration Membrane System","UF Membrane":"UFc90AL","Multiple -Choice Control Valve":"Automatic","Recovery Rate":"50%-75%","Operating temperature":"5\u2103 - 39\u2103","Pump optional":"Ling xiao \/ CNP \/ Grundfos","Usage":"Water Purifiier","Pretreatment":"Carbon Filter"}}