(3 Pack) Fluval Edge Carbon Clean and Clear Renewal Sachets (3 Sachets Per Pack / 9 Total) 9 Total Fluval EDGE Carbon Clean & Clear Renewal Sachets (3 Packs with 3 per Pack) Works to rid your tank of toxins Works to rid your tank of toxins Ensures your water is the best quality for your fish Premium grade carbon providing superior adsorption qualities Replace every 2 to 4 weeks