Continue shopping “Unicel Aquaterra 303279 3113 RST 3113RST Spa Hot Tub Cartridge Filter 5CH-37” has been added to your cart. Product Price Quantity Total × Above Ground Swimming Pool Pump Cartridge Filter Package TWM-30 520-4070 $273.59 Above Ground Swimming Pool Pump Cartridge Filter Package TWM-30 520-4070 quantity $273.59 × Unicel Aquaterra 303279 3113 RST 3113RST Spa Hot Tub Cartridge Filter 5CH-37 $41.17 Unicel Aquaterra 303279 3113 RST 3113RST Spa Hot Tub Cartridge Filter 5CH-37 quantity $41.17 Cart totals Subtotal $314.76 Shipping Shipping costs will be calculated once you have provided your address. Total $314.76 Proceed to checkout — OR — Calculate shipping Country / region: Select a country / region… United States (US) State / County: City: Postcode / ZIP: Update