Dynamic Series IV-DFM, DFML, Waterway 35 In-Line Compatible Filter Cartridge letter-size_6 Inch The Rock-the-House is designed to

The Rock-the-House is designed to handle anything you can throw at it – even dunks

This is a Hayward ECX1326A Flex Loop Elbow for StarClear Cartridge Filter Modular Flex Loop Systems and StarClear II Cartridge Filter Modular Selecta-Systems

This is meaningful because those same products (many of which are phosphate-based) would directly conflict with phosphate removal efforts

(1) N/S Quad O-Ring

Dynamic Series IV-DFM, DFML, Waterway 35 In-Line Compatible Filter Cartridge letter-size_6 Inch The Rock-the-House is designed toThe Hurricane HF4335 01 Cartridge Filter is compatible Dynamic Series IV DFM, DFML, Waterway 35 In Line, Guardian 409 219, and 03FIL1300, 17 2482, 25393, 303557, 817 3501, R173431 and other compatible models. It is identical to Pleatco PRB35 IN, Unicel C 4335, and Filbur FC 2385 filter cartridges. The original manufacturer's names and part numbers are for reference only. Hurricane's advanced point bond filter media has tighter filtration capabilities