The Unicel C-2308 is an 8 sq. ft. replacement filter cartridge engineered for the high-demand environment of Pentair's Caribe multi-element cluster filter systems. Constructed with 3 oz. Reemay 2033 pleated polyester media and 84 precision pleats, this compact cartridge delivers consistent filtration efficiency and extended media life — critical when dozens of cartridges operate together as a single filtration bank. ⚠️ IMPORTANT: Multiple Cartridges Required for Full Filter Service This cartridge is used in Pentair's Caribe multi-element filter systems, which require a complete set of cartridges for proper operation. Replacing only some cartridges will compromise overall system performance and water balance across the filter bank. Required quantities per system: • Caribe 133 — requires 17 cartridges • Caribe 184 — requires 23 cartridges • Caribe 368 — requires 46 cartridges Add the correct quantity to your cart to complete your full filter service. Specifications Filter Area 8 sq. ft. Length 9 3/4" Outer Diameter 2 7/8" Top Inner Diameter 1 1/16" Bottom Inner Diameter 1 1/16" Material 3 oz. Reemay 2033 Pleat Count 84 Top Cap: Open Bottom Cap: Open Fits Into: OEM Brand Filter System Part Number Notes Pentair – American Products Caribe 133 57011400 Requires 17 cartridges Pentair – American Products Caribe 184 57011400 Requires 23 cartridges Pentair – American Products Caribe 368 57011400 Requires 46 cartridges Pentair – Rainbow Plastics Dynamic Series 17-2055 (This is not an exhaustive list.) Also known as: C2308
