Reef Octopus Regal Internal Protein Skimmer REGAL-200INT For aquariums up to 400 gallons with a light filtration demand. For aquariums up to 300 gallons with a medium filtration demand. For aquariums up to 200 gallons with a high filtration demand Footprint: 14 Reef Octopus 24V VarioS-4S Controllable Pinwheel Pump. Latest in DC controllable technology. Pump has 5 controllable energy efficient power settings Output Size: 40mm - Comes with metric to British adapter to 1.25 pvc Recommended Sump Water Depth: 7