The Red Sea RSK 900 Reefer Internal Protein Skimmer is engineered to provide powerful and efficient organic waste removal for saltwater aquariums. Designed with the hobbyist in mind, this in-sump skimmer combines quiet operation with ergonomic features to simplify maintenance and enhance performance. Its core function is to produce a massive volume of fine bubbles that effectively strip dissolved organic compounds from the water column, resulting in superior water clarity and a healthier environment for your aquatic inhabitants.

This unit is packed with advanced features for optimal performance and user convenience. It is powered by a reliable Sicce PSK-1200 pump that draws 900 LPH of air while consuming only 20 watts of power. Key innovations include an integrated manual neck cleaner and a FoamView window, allowing for easy cleaning and monitoring of skimmate production without disassembly. The skimmer also features a high-flow air silencer and vibration-reducing feet for near-silent operation, a simple water level control for precise tuning, and a versatile footprint that can be adjusted to fit into tight sump spaces.

The Red Sea RSK 900 is ideal for the dedicated reef aquarist seeking a high-performance, low-maintenance filtration solution. It is rated for heavily stocked reef tanks up to 240 gallons, medium bioload systems up to 500 gallons, and light bioload aquariums up to 740 gallons. Its combination of powerful skimming, quiet operation, and user-friendly maintenance features like the collection cup drain line makes it a superb choice for maintaining pristine water quality in demanding reef ecosystems.