Berlin Air-Lift 60 Internal Protein Skimmer (12.5"H; 60)
Lime wood air stone.Separate water inlet and water outlet.Triple air pass.Can be disassembled completely for easy cleaning.Compact design.Can be installed in aquarium, filter sump or filter compartment.Air pump not included.Protein skimming is a method to efficiently remove waste materials from seawater by absorption of dissolved organic substances to fine air bubbles. The substances involved (for example proteins leached out of fish food) tend to assemble at air-water surfaces. A protein skimmer creates an enormous air water surface as numerous fine air bubbles are blown in. The combined rising of the dirt covered air bubbles and the turbulence inside the skimmer create a stable foam that is pushed into a collection cup. The benefit of a protein skimmer lies in the fact that once the waste materials are skimmed off, they are excluded from the water flow, preventing bacteria from decomposing these organic compounds e.g. to nitrate and phosphate. Since it removes their food source, a protein skimmer also reduces the amount of harmful free floating bacteria.When air is administered to the Berlin Air-Lift, a continuous stream of fine air bubbles will rise into the inner tube. The air bubbles also draw aquarium water into the skimmer (air-lift effect). The inner tube opens into the outer tube holding the foam cup. In the first pass of the air bubbles, from the air-stone up through the inner tube, foam will be formed and pushed into the foam cup. The water will flow down the outer tube, drawing with it a significant amount of air bubbles. The outer tube ends at the air return skirt, forcing the air upwards, against the current, in the direction of the foam cup. The water without air will flow back to the aquarium via outer tube and air return skirt.

Berlin Classic Protein Skimmer (Stand Alone)
The original version of the world's best venturi driven protein skimmer features the patented triple pass action in a unique compact design.Suitable for tanks up to 250 gallons.The unit is self-leveling and may be installed in or alongside the sump or aquarium. Made from ozone safe materials and designed for easy maintenance.The Berlin PrincipleExtensive experimentation with the patented triple-pass action resulted in the unique, compact design of the Red Sea Berlin Skimmer which concentrates the waste without unnecessary loss of water. The triple-pass is combined with a powerful venturi air injector, greatly enhancing the efficiency of the skimmer. Air bubbles and protein rich water are concentrated in the narrow inner tube, ensuring good mixing and maximum surface contact. The air/water mixture swirls up the inner tube into the wider reaction chamber, causing a relaxation of the turbulent water and separation of the protein rich foam at the water surface which rises into the collection cup. The air bubbles move down the chamber by the force of the water current until reaching the air return skirt located at its base. The skirt effectively enlarges the diameter of the chamber, eliminating the downward force on the air bubbles. The bubbles then rise up through the chamber against the downward flow of the water (counter current), causing great turbulence and increased contact time. The venturi injector produces a consistent quality of fine air bubbles, ensuring a large surface area for collection of waste materials.The unit is not for freshwater.

Red Sea Deco Art Nano Filter (3"W X 3"D X 4"H; Filter)
Highly efficient mini-filter for all aquariums up to three gallons. Perfect for desktop aquariums.Combines mechanical, biological, and chemical filtration for superior results.Adjustable flow control for a variety of aquarium styles and sizes.Easy to install and maintain.Super silent operation.Uses easy to change filter pads, sold separately.

Red Sea Prizm Skimmer (9.5"W X 5.5"D X 13.75"H)
Skimmers extract dissolved organic waste products (proteins) from the aquarium by mechanically removing them through foam fractionation. Efficient skimmers such as the Prizm remove proteins before they break down and pollute the water. Skimming enhances the quality of the aquarium's environment as well as its appearance.With protein skimming as the waste material is removed it is separated from the water flow. In contrast, the particulate matter collected in a mechanical filter stays in contact with the water flow and, if not removed, breaks down, increasing the organic loading of the aquarium.The Prizm combines an efficient 12-blade turbo-jet air injector together with Red Sea's convergent-divergent flow technology reaction chamber, resulting in exceptional skimming performance.Suitable for all marine and reef aquariums up to 100 gallons.Skim enhancing, convergent-divergent reaction chamber with triple-pass airflow.12-blade turbo-jet air injector generates a constant stream of micro-bubbles in a homogenous air/water mixture.Flow regulator enables optimization of the skimming action for all aquarium conditions.Includes Prizm Energizer external water pump.Slim-line, hang-on design only 2.4" deep.Removable waste collection cup.Cascade water return.User-friendly setup and operation.Ideal for both new and experience marine aquarists.Prizm TechnologyThe unique Prizm reaction chamber consists of a convergent upward flow first stage, followed by a divergent downward flow second stage. The decreasing cross-sectional area of the first stage causes great turbulence and extended contact time between the air bubbles and water. The increasing cross-sectional area of the second stage causes the air bubbles to flow both co and counter current. The combined action of the two stages creates a protein-loaded, stable foam at the throat of the skimmer.