Protect yourself from swimming or soaking in dirty water. Buy a replacement filter for your Dynamic pool or spa! This affordably priced 5-inch x 13 5/16-inch replacement filter from Tier1 help reduce sediment with minimal impact on service flow using premium flat bonded filter media. Flat bonded media provides effective filtration across 100% of the media surface compared to point bond media where up to 25% of the filter surface is blocked by the fiber bonds. Give yourself the clean, clear water your pool or spa was intended to provide by changing out your filter every 3 months, or as the quality of your water source dictates Protect yourself from languishing in muddy water at home by purchasing the inexpensive 5-inch by 13 5/16-inch Tier1 replacement filter for your Dynamic pool or spa from us today!