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 × Unicel Aquaterra 303279 3113 RST 3113RST Spa Hot Tub Cartridge Filter 5CH-37 $44.99 Unicel Aquaterra 303279 3113 RST 3113RST Spa Hot Tub Cartridge Filter 5CH-37 quantity $44.99 Cart totals Subtotal $44.99 Total $44.99 Proceed to checkout — OR — Coupon: