The Reef Breeders ReefRhythm 400 Protein Skimmer is a high-performance, DC-powered device designed for efficient waste removal in saltwater reef aquariums. Part of the latest RR series, this in-sump skimmer features a space-saving internal pump, making it an ideal choice for maintaining pristine water quality by concentrating and removing fish waste and other organic pollutants before they break down.

Key features include a fully controllable DC pump offering 9 flow speeds and 3 selectable feed timers (10, 30, or 60 minutes), with an LCD displaying remaining feed time. Its unique octagonal base tapers into a circular column, maximizing internal space for effective skimming. The skimmer is equipped with a needle wheel impeller and an air silencer for quiet operation, while the collection cup includes both a stopper for standalone use and a drain hose for connection to a larger waste container. The RR-400 model is specifically rated for tanks between 250-400 gallons, operates at an ideal water level of 8.75 inches, and boasts a max air intake of 210 gallons per hour, a max pump flow rate of 800 gallons per hour, and a max power consumption of 45 watts. Its compact dimensions are 9.8 x 7.5 x 23.25 inches.

This protein skimmer is best suited for reef aquarists with medium to large tanks, ranging from 250 to 400 gallons, who require a powerful yet controllable and quiet solution for nutrient export. Its advanced features, including the adjustable DC pump and thoughtful design for maximizing efficiency and minimizing footprint, make it an excellent investment for maintaining a healthy and stable reef environment.