The Reef Octopus Regal 220-INT Protein Skimmer is rated for aquariums up to 500 gallons where sump space isn't a constraint. It runs the newer-generation RODC-5500S controllable DC pinwheel pump — Reef Octopus's next step in variable-speed flow technology — inside the same hybrid conical body used across the Regal line. Capacity: up to 500 gallons, no sump-space restriction Pump: RODC-5500S controllable DC pinwheel pump, true 10-second slow-start ramp Control features: 5 preset speeds via LED-indicated controller, single-button 10-minute feed/service mode, rotatable output volute (90-degree increments, vertical or horizontal discharge) Body: solid cast acrylic, hybrid conical shape, fully disassembles for cleaning The rotating output volute is worth noting during planning — it lets you route discharge water vertically or horizontally in 90-degree steps to match your sump's plumbing layout.Compatible replacement parts: RODC-5500S pump kits sized for the Regal 220 series.
